Replacement storage path for iPod 4G Monochrome. Use it for failed hard-drive behavior, restore trouble, or storage upgrades after the battery is stable and the drive cable or adapter seating has been checked.
Product Overview
This hard drive listing covers Replacement Hard Drive (40GB) and its own connector path on the iPod 4th Generation (Monochrome).
Use Part Details for the confirmed part-number reference. Use the Compatible Variants table below to confirm capacity, color, case, or order-number fitment.
Choose this part when your iPod shows Sad iPod Icon, Folder Icon, or Clicking Noise; the checks below help confirm the right part before you order.
Storage failure symptoms such as a sad iPod, folder icon, restore loop, or the audible click of death should still be checked against the drive cable and connector seating before replacing the drive.
Choose Your Option
This part comes in multiple variants. Confirm your iPod's capacity, case depth, and order number before ordering.
Use this linked storage option only for 20GB thin-case iPods and the order numbers shown here.
View this option →For thick 40GB A1059 4G Monochrome builds only. Match 8mm 50-pin ATA/PATA drive height and order number before ordering.
You're viewing this optionWhat Is Included
Condition: Used factory-original part. Quantity and exclusions: The listed part, set, pair, or configuration above is supplied with exactly one plastic pry tool. No other parts, tools, adhesives, or materials are included unless they are explicitly listed above.
Quick Buying Check
Buy this when
- Hard Drive Failure: Use the drive check when disk mode, restore behavior, clicking, sad-iPod, or folder symptoms remain after cable seating and battery stability checks.
Diagnose first when
- Confirm thin or thick case thickness before ordering hard drive, rear case, or headphone-jack assembly parts.
- For thick 40GB A1059 4G Monochrome builds only. Match 8mm 50-pin ATA/PATA drive height and order number before ordering.
Other Symptoms That May Involve This Part
| Symptom | What it means & what to check |
|---|---|
| boot loop, not recognized | Treat this as a restore or storage-path symptom, not proof of a bad drive; the drive becomes more likely when cable, USB, formatting, and restore checks still lead back to storage warnings. |
| frozen, skipping | Playback skips, freezes, or corrupted data become drive clues when they happen during storage access or sync. |
| grinding | Mechanical clicking or grinding points toward the drive after the hard-drive cable has been reseated and checked. |
| restore fails with the sad iPod icon | These warnings mean the iPod cannot reach a usable storage path; check the cable first, then the drive. |
Specifications & Fitment
Part Details
| Detail | Value |
|---|---|
| Model Number | A1059 |
| EMC | EMC 1995 |
| Condition | Used — factory original Apple part. Normal cosmetic wear expected. |
| Drive Model | MK4004GAH |
| Capacity | 40GB |
| Form Factor | 1.8" 50-pin ATA/PATA Toshiba/iPod form factor |
| RPM | 4200 |
| Manufacturer | Toshiba |
| Interface | 50-pin Toshiba/iPod ATA/PATA |
| Drive Height | 8mm |
| Platters | 2 |
| Height | 8mm |
Compatible Variants
| Order Number | Capacity | Color | Case | Compatible | Notes |
|---|---|---|---|---|---|
| M9268LL/A | 40GB | White | thick | Yes | — |
| PE436A | 40GB | White (HP) | thick | Yes— compatible | Stock match |
| M9787LL/A | 20GB | Black/Red (U2) | thin | No— wrong case depth | Owner-verified: 20GB thin A1059 builds Use Replacement Hard Drive (20GB) instead. |
| M9282LL/A | 20GB | White | thin | No— wrong case depth | Owner-verified: 20GB thin A1059 builds Use Replacement Hard Drive (20GB) instead. |
| PE435A | 20GB | White (HP) | thin | No— wrong case depth | Owner-verified: 20GB thin A1059 builds Use Replacement Hard Drive (20GB) instead. |
is not compatible with
- 20GB thin A1059 builds
- iPod Mini and later connector storage
Diagnostic Failure Cards
Use these model-specific failure cards to decide whether this drive is the right part, a nearby part needs checking first, or escalation makes more sense after simpler checks.
| Symptom | What it means & what to check |
|---|---|
| Symptom remains after basic checks |
What you may see: The iPod still points back to Replacement Hard Drive (40GB) after cable seating, battery stability, and nearby connector checks. Check first: Retest with known-good cables or adjacent parts where practical before ordering. Check next: A nearby cable, connector, battery, storage device, display path, audio path, or board path can mimic a bad drive. |
| Symptom changes when touched or reseated |
What you may see: The symptom changes after moving the part, reseating a cable, or applying light pressure near the connector path. Check first: Inspect the connector, latch, flex, solder joints, and nearby board area for damage or corrosion. Check next: This can still be a connection issue rather than a failed drive alone. |
| Problem began after another repair |
What you may see: The issue started immediately after opening the iPod, replacing another part, or disturbing an internal cable. Check first: Reopen only as far as needed and inspect the exact area touched during the previous repair. Check next: Post-repair symptoms often trace to seating, latch, screw, or cable issues before Replacement Hard Drive (40GB) itself is confirmed bad. |
| Sad iPod, clicking, restore, or storage trouble |
What you may notice
Diagnose first when
Similar issues to separate
When this drive fits
Check another part first
Repair or replacement paths
|
| Ribbon, connector, or ground-path checks |
What you may notice
Diagnose first when
Similar issues to separate
Check another part first
|
| Symptoms changed after repair or reassembly |
What you may notice
Diagnose first when
Similar issues to separate
When this drive fits
Check another part first
Repair or replacement paths
|
| Fitment and inspection notes |
|
Repair considerations
Run these checks before replacing the drive — they confirm the drive is the right fix and not a nearby fault:
- Restore/format steps can erase data or indicate storage failure
- Treat ribbons, tabs, and connectors as fragile
- Use reset, Disk Mode, restore, or iTunes/Finder behavior as a software/storage check
- Inspect connector latch, socket, or clamp condition
- Reseat or inspect ribbon cable and connector seating
- Check drive noise, SMART/data signs, or storage recognition
Do Not Buy / Problems This Drive Does Not Fix
| Situation | Start here instead |
|---|---|
| Variant or capacity does not match this listing | Use the Replacement Hard Drive (20GB) listing instead. |
| You see a folder icon, clicking noise, or restore failure | Check the drive or flash media, storage cable, adapter seating, formatting, and restore path before replacing any part. |
| Charging, swelling, runtime, or power is the primary problem | Start with battery health, charger behavior, and spin-up load before buying storage. |
| Recent service or connector disturbance is the main clue | Inspect and reseat the storage cable and board connector before replacing storage. |
| A symptom points to a different part | Start with battery for power/runtime symptoms; hard-drive cable for folder, clicking, or restore symptoms; LCD screen for display-only symptoms; headphone jack for audio or Hold-switch symptoms; click wheel for click-wheel or control symptoms; logic board for board-side damage or multi-system symptoms before buying this part. |
Compatible & Upgrade Drives
These additional 1.8-inch drives are documented as compatible replacements or higher-capacity upgrades for this iPod and accept a standard restore:
- MK2006GAL — 20 GB — 5mm drive on the same 50-pin connector. It is the thin-shell drive: if your iPod is a 20GB build, order from the thin 20GB listing instead.
- MK4006GAH — 40 GB — 8mm drive — fits the thick (40GB) shell only; is not compatible with the 5mm thin 20GB shell.
ZIF drives are a different interface and no adapter stack is documented closing up inside this iPod: the thin 20GB shell has no depth to spare, and nobody has reported a ZIF-to-50-pin stack finished inside the thick 40GB shell either.
Install Overview
Before You Start
Turn Hold off, reset with Menu + Select — hold both until the Apple logo appears, about ten seconds — and confirm the model and variant before opening the iPod.
Treat case opening as the highest handling risk. Work around the seams gently and stop if the shell, clips, or internal stack resist.
Do not pull the halves apart or side-load board sockets. Reseat nearby ribbons and connectors before blaming a replacement drive.
Verify the exact generation, capacity/thickness variant, connector, and part listing before ordering; similar-looking iPod parts are not always interchangeable.
Disassembly Guide
Disassembly guide summary: iPod 4th Generation or Photo Hard Drive Replacement.
Show all 5 installation steps
Before you open the iPod, confirm that the hold switch is in the locked setting. The orange bar should be showing, indicating hold is active.
Move an opening pick as far as possible into the gap between the plastic front and the metal back panel, on the right edge of the iPod. You may have to rock the pick back and forth to move it in farther. With the opening pick, lever up against the plastic front panel and release 5 retaining tabs. Slide the pick along the iPod edge and keep levering gently until the remaining retaining tabs release. In this step, after all five tabs along the right edge are free, the case should easily open.
The iPod case is now open, but do not separate the two halves yet. An orange ribbon cable still connects the headphone jack to the logic board. With the dock connector edge at the top, open the case like a book and set the rear panel beside the iPod front half.
With a plastic tool or your fingernails, carefully detach the orange headphone jack cable. Make sure to draw straight up on the connector, not the cable itself. This fragile ribbon cable can stay connected for a battery replacement. Prop and tape the rear case against a box so the headphone jack remains connected to the motherboard without straining its cable while you work.
Grasp the hard drive with one hand and carefully detach the orange ribbon cable from the hard drive with your other hand. In this step, if the cable doesn't come free easily, it may be useful to gently wiggle the cable from side to side.
Product-specific placement, reassembly, and check
- Prepare and access. Confirm the exact model and listing fit first. Use the existing steps as a disassembly guide, gather the specified tools, disconnect power where applicable, and keep screws and cable positions organized.
- Place Replacement Hard Drive (40GB). Seat the exact storage part, cable, or adapter in the original storage path and match its orientation, case depth, and supported configuration.
- Reassemble without force. Reverse only the access steps needed for this repair, keep cables clear of case edges and screw posts, and close clips in stages.
- Validate before final closure. Before final closure, verify detection, Disk Mode or restore behavior as applicable, and stable startup without repeat clicking or a loose connection.
Stop condition: Stop if a connector, latch, screw, clip, housing edge, or the replacement part resists normal alignment. Recheck model fit, orientation, cable routing, and trapped hardware instead of forcing it.
After This Repair
| Check | What to do |
|---|---|
| Restore and sync | Confirm the iPod restores cleanly and mounts with the computer and cable you plan to use. |
| Check under load | Listen for repeated spin-up, adapter resets, or restore loops that can point back to cable seating, formatting, or battery stability. |
| Still not working? | Reseat the storage cable and verify formatting or adapter setup before blaming the logic board. |
Consider Flash Storage
Instead of replacing the mechanical hard drive, this model can also use a flash-storage upgrade path for better shock resistance and lower power draw.
Format note: cards of 64GB and above ship formatted exFAT, and the original firmware wants FAT32 — but do it in the adapter maker's order: restore first; if the restore or sync fails on a 64GB-or-larger card, prepare it as FAT32/MBR and restore again.
Upgrade option: flash mod kit for this iPod
Worth Knowing
- Uses PATA interface — 50-pin Toshiba/iPod ATA/PATA connector
- 8mm height — fits thick case only
- Upgrade options reported by the repair community to fit the 8mm bay (thick 40GB shell only): MK6006GAH (60GB), MK8007GAH (80GB) — not owner-verified fitment.
- Consider flash adapter IDE-to-SD adapter as a modern alternative to mechanical HDD replacement.
Folder Icon: What Owners Describe
A folder with an exclamation mark means the iPod cannot find its storage — the drive, its ribbon cable, or the software on it. A sad-face iPod icon is the same message in the older style: it cannot use its hard drive. Neither picture says on its own which of the three has failed. On the iPod 4th Generation (monochrome), Folder Icon can describe more than one observable problem. These paraphrased owner reports are anecdotal starting points for diagnosis, not proof that any single part failed.
Anecdotal owner reports (not a guarantee or authoritative proof): - One owner reported that the folder-error icon remained after a drive adapter and logic-board replacement, and the computer still did not detect the iPod.
Owners searching for this describe it as: iPod 4th Generation (monochrome) Folder Icon, iPod folder error icon, iPod folder warning.
Stuck On Apple Logo: What Owners Describe
On the iPod 4th Generation (monochrome), Stuck On Apple Logo can describe more than one observable problem.
- Another owner reported that the iPod remained at the Apple logo after a battery replacement and would not enter disk mode.
Owners searching for this describe it as: iPod 4th Generation (monochrome) Stuck On Apple Logo, iPod stuck on Apple logo, iPod Apple logo freeze.
What Owners Report
These are anecdotal owner reports, not guarantees or authoritative proof that a particular part will fix a symptom. Use them as a troubleshooting starting point: confirm the symptom, run the quick checks, then match the fix.
Drive replacement and upgrades — interface and thickness first
Symptoms. Failed drive and the question of what actually fits: will a smaller drive substitute in an upgraded unit; can a drive move between this model and its color-screen sibling; the board-side ribbon socket cracked and needs a name; will a ZIF-drive-to-pins adapter stack fit inside.
Quick diagnosis.
- Confirm the interface before ordering anything: the drive side on this model is a 50-pin ATA pin interface, friction-fit — NOT a ZIF drive socket. Some adapter listings call this same Toshiba connector 44-pin IDE; it is the one interface under two names, so match the physical connector rather than the number in a title. ZIF language on this model otherwise belongs only to the board-side ribbon latch, where the 632-0259-A cable lands.
- Match the drive to the case class: the thin 20GB build takes 5mm-height drives; the thick 40GB build takes 8mm. Measure and compare exact drive dimensions against the one you removed before purchase.
Fixes.
- Same-connector drive swap — drives with the shared 50-pin connector swap directly, and the third-generation model, this model and the colour-screen sibling share that drive-connector family; buy from the page that matches your iPod so capacity and thickness line up. Check or replace the 632-0259-A ribbon while the unit is open.
- 50-pin solid-state replacement — one owner documented a same-connector solid-state drive dropping into the 5mm bay exactly like the original: thin case unaffected, no thick-case parts needed. That build was on a sibling-family unit, so treat the bay and connector geometry as the shared part of the report and nothing else.
- Larger spinning drive — an 80GB drive of the right 50-pin 8mm class is a community recommendation with no first-hand confirmation on this model; treat it as a report, not a guarantee.
Cautions.
- ZIF drives are a different interface and no adapter stack is documented closing up inside this iPod: the thin 20GB shell has no depth to spare, and nobody has reported a ZIF-to-50-pin stack finished inside the thick 40GB shell either. Budget for a drive that fits the bay as it is.
- Dual-platter 8mm drives draw noticeably more spin-up current: on a tired battery that sags the rail and loops the boot. Pair any big-drive swap with a healthy pack.
- 60GB was never a factory configuration here — the factory options were 20GB and 40GB; 60GB units in these threads are upgraded devices or the color-screen sibling.
Community signal. Reported by 6 owners.
Sad face, folder icon, or clicking — diagnose before buying parts
Symptoms. File-with-exclamation boot loop after a drive swap; sad face at power-on; noise as if trying to work, but no response; stuck on the Apple logo and won't enter disk mode; visibly damaged board parts near the connector after a mishap.
Quick diagnosis.
- Built-in diagnostics first: reset with Menu + Select, then hold Rewind + Select at the Apple logo. Check whether the drive is accessible or erroring before buying any part.
- Bench-test the suspect drive externally on a USB adapter to split drive vs cable vs board.
- Inspect the 632-0259-A cable for tears and bent pins whenever the drive "fails" — cable faults impersonate drive death, and garbled drive-information output in diagnostics points at the cable rather than the drive.
- In the diagnostics drive-health screen, one owner reads the pending-sector count rather than the reallocated count as the health signal on these drives.
- Before any restore, copy anything you want to keep off the iPod — a restore erases it.
Fixes.
- Drive replacement, flash preferred — when diagnostics implicate the drive, owners steer straight to solid-state at this point; reinstall the software afterward and the sad face is normally gone.
- Whole-board replacement over board-level repair — no public schematics exist for this board, so component-level troubleshooting is guesswork; for genuine board damage a complete replacement board is the economical path, and the model is widely considered worth fixing.
Cautions.
- The sad face usually means the drive, not the board — clear the cheap suspects (cable seating, then drive) before writing off the logic board.
- This model's storage warnings are the sad iPod face, the folder with an exclamation mark and the apple.com/support/ipod prompt. A literal red X in a circle is later-Classic language — seeing one means you are looking at a different iPod.
- The community's tap workaround is a symptom of drive-head stiction, a real failure mechanism on these drives after long storage; it is temporary evidence of a dying drive, never advice. Don't strike the device.
- A restore on this model finishes on FireWire power (the wall-outlet handshake) — a FireWire wall adapter or a powered FireWire port on an older computer — so have one available before drive surgery, or the reinstall will stall.
Community signal. Reported by 5 owners.
Frequently Asked Questions
Use these questions to narrow the part path before ordering. They keep each answer focused on a different diagnostic or fitment decision.
Restore & sync: what does a restore on this model need?
Copy anything you want to keep off the iPod first — a restore erases it. Owners describe the failure this way: a restore asks for a power adapter partway through, a phone-charger USB brick doesn't clear the prompt, the attempt ends in a sad face, and the computer can't see the iPod afterwards. That prompt is the restore-finalize handshake, not damage. The software crosses over USB, then the iPod shows the wall-outlet-and-charger picture and waits for 12V on the FireWire power pins before it installs. Plan on FireWire power to finish it: the original FireWire wall adapter, any iPod charger made before 2005 (they were FireWire-based), or simply an iPod FireWire cable and a powered FireWire port on an older computer. Owners report some high-power USB sources passing the check — that is not guaranteed, so do not count on it. Once a restore has finished properly, the iPod syncs over USB again as normal. There are no separate drivers to chase: use iTunes for Windows, or the newer Apple Devices app, on Windows, and Finder on recent macOS. Era-specific download links in old threads are stale.
How do I choose the right hard drive capacity?
Match capacity 40GB and color White, drive height, connector/interface, and order number before ordering. Thin and thick storage options can use different physical drives.
Can I use flash storage instead of this hard drive?
Usually yes on models with a supported flash-mod route, but adapter, formatting, and case-clearance checks still matter. Use the flash-mod page when you want solid-state storage instead of another mechanical drive.
When is this drive the right fix for sad iPod, clicking, or restore trouble?
Listen for repeated drive clicking and note whether the iPod reaches disk mode — reset with Menu + Select, then release and hold Select + Play/Pause to get there. Reseat the hard-drive ribbon and inspect the storage connector or retaining latch before buying another storage part. Try restore only after cable seating and power behavior are stable enough to complete the process. Compare with a known-good drive, cable, or flash adapter when available. Confirm thin or thick case thickness before ordering hard drive, rear case, or headphone-jack assembly parts.
Is this an iPod Classic?
Apple's 'Classic' branding started with the 6th Generation (2007). This is the iPod 4th Generation (Click Wheel), the monochrome-screen model from 2004. Apple's official name for this model is iPod (Click Wheel).
Some buyers search for "replace the 20GB drive with a 60GB", "hard drive upgrade to newer type", or "frozen iPod"; confirm the checks above point to this same part before ordering.
Why people land on this part
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You May Also Want
Users replacing the hard drive often upgrade the battery at the same time.
Related: 128GB Flash Mod Kit (IDE flash adapter + 128GB SD Card Included)Flash storage mod eliminates mechanical failure risk entirely.
Related: Hard Drive IDE Ribbon CableIDE ribbon cable should be inspected during hard drive replacement.
