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, Clicking Noise, or Red X Icon; 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.
- A compatible upgrade option is the Toshiba MK8007GAH (80GB), which uses the correct ATA-6 pin interface.
- Put iPod in Disk Mode and format as Mac OS Extended (Journaled) if Restore fails
- If restore fails, format the hard drive via Windows: right-click iPod in My Computer and select Format
- Coconut Battery is a Mac utility that can provide diagnostic information about the iPod battery's health
- The Toshiba MK8007GAH 80GB is a compatible upgrade drive
- Compatible Toshiba drives end in 004 or 006 (MK4004GAH, MK2006GAL, MK2006GALC, MK3006GAL, MK4006GAL)
- Use a USB-to-ZIF adapter cable to test the hard drive externally on a computer
- Error 1429 typically indicates a hard drive problem
- Test the hard drive externally with a USB adapter to verify functionality
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
Quick Buying Check
Buy this when
- Hard Drive Failure: Use the drive check when disk mode, restore behavior, clicking, sad-iPod, red-X, or folder symptoms remain after cable seating and battery stability checks.
Diagnose first when
- Confirm thin or thick case thickness before ordering battery, hard drive, cable, or rear case parts.
- Confirm the capacity match before ordering: 40GB.
- Confirm the case thickness before ordering: thick.
- OEM drive for the 40GB 8mm route: Toshiba MK4004GAH (dual-platter).
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 | 20GB thin A1059 builds Use Replacement Hard Drive (20GB) instead. |
| M9282LL/A | 20GB | White | thin | No— wrong case depth | 20GB thin A1059 builds Use Replacement Hard Drive (20GB) instead. |
| PE435A | 20GB | White (HP) | thin | No— wrong case depth | 20GB thin A1059 builds Use Replacement Hard Drive (20GB) instead. |
is not compatible with
- 20GB thin A1059 builds
- A1099 Photo/Color models
- 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.
Check before ordering
Sad iPod, clicking, restore, or storage trouble
What you may notice
- People describe clicking, sad iPod or folder screens, restore loops, disk-mode trouble, or storage that will not behave after replacement.
- Sad iPod, red X, clicking drive, restore loop, or disk-mode trouble.
Diagnose first when
- Confirm thin or thick case thickness before ordering battery, hard drive, cable, or rear case parts.
- Listen for repeat clicking or repeated spin-up attempts before replacing storage parts.
- Check whether the iPod enters disk mode, restores cleanly, and is recognized by the computer.
- If a drive or flash adapter was just installed, recheck cable seating, adapter orientation, and formatting before buying another part.
- Use clicking sounds, disk mode, restore behavior, connector seating, and power stability to isolate the storage device.
Similar issues to separate
- The 4G comes in thin 20GB and thick 40GB case variants. Battery, hard drive, and backplate fitment can differ by case thickness.
- The storage drive can be involved, but the drive cable, adapter formatting, power stability, or logic-board storage path may also be responsible.
- Check storage / restore route, connector seating, and board-side damage before ordering.
When this drive fits
- Choose this storage drive only when clicking, restore failure, or disk errors follow this part or its connection path.
- Choose this drive when the symptom remains isolated to this assembly, its ribbon, or its connector path after first checks.
Check another part first
- Check the storage cable, adapter setup, battery power stability, and board connector when the symptom changes after reseating or swapping storage.
Repair or replacement paths
- Replace the storage drive only when the storage or restore symptom is tied to this part's role in the startup path.
- Use cable, adapter, or board diagnosis first when restore behavior changes with seating, formatting, or another known-good storage device.
- Advanced or board-level cases
Ribbon, connector, or ground-path checks
What you may notice
- A symptom starts after opening the iPod or disturbing an internal flex cable.
Diagnose first when
- Inspect for liquid, corrosion, residue, torn flex material, or connector damage.
Similar issues to separate
- Connector seating, ribbon damage, or ground-path issues can involve this part, a nearby connector, or a board path.
Check another part first
- Check the Hard Drive IDE Ribbon Cable when storage-cable symptoms after drive replacement, reseating, or adapter work are the main problem.
- Check the Replacement Battery (All Capacities) when power, charging, runtime, or swollen-battery behavior is the main problem.
Fitment and post-repair traps
Symptoms changed after repair or reassembly
What you may notice
- People describe a new problem appearing immediately after battery, storage, display, audio, or control work.
- A new symptom appeared after battery, storage, audio, display, or control work.
Diagnose first when
- Reopen only as far as needed to inspect the areas touched during the repair.
- Compare the new symptom with what worked before the repair.
- Check cable seating, latch position, and part variant before replacing a second part.
Similar issues to separate
- A post-repair symptom can involve the storage drive, but disturbed ribbons, latches, grounding, connector seating, or the wrong variant part are common checks before ordering again.
- Check post-repair regression, connector seating, and board-side damage before ordering.
When this drive fits
- Choose this storage drive only when the part itself was torn, creased, or damaged during service.
Check another part first
- Check the exact connector or assembly disturbed during the repair before treating the new part as failed.
Repair or replacement paths
- Correct seating, latch, or variant problems first.
- Replace the storage drive when the repair damaged that assembly or its flex path.
Fitment and inspection notes
- 20GB thin A1059 builds.
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.
Repair considerations
Repair specialists who work on this model consistently flag these checks before replacing the drive — they help 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. |
| A symptom points to a different part | Start with the neighboring part or diagnostic that matches your symptom (storage, cable, battery, screen, audio, or board) before buying this part. |
| You see a folder icon, clicking noise, or restore failure | Confirm restore behavior, storage fit, and setup state before ordering this 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. |
- Most USB-to-ZIF adapters include multiple adapters for different connector types
- The selected drive is not compatible.
- The 4th generation uses a DDKLtd MCD-D50SA-3 connector (pin-style)
- Compatible Toshiba drives include models ending in 004 or 006, such as: - MK4004GAH - MK2006GAL - MK2006GALC - MK3006GAL - MK4006GAL The 4th generation uses a DDKLtd MCD-D50SA-3 connector (pin-style).
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
- MK4006GAH — 40 GB
- MK2431GAH — 240 GB — mechanical HDD (8mm, ZIF interface; adapter required — not a drop-in for this model)
- HS161JQ — 160 GB — mechanical HDD (Samsung; CE-ATA era — no verified adapter path to this model)
Install Overview
Before You Start
Turn Hold off, use the reset sequence for this generation, 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.
Repair Guide
Repair 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.
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: SDXC cards (64GB+) must be pre-formatted to FAT32 — default exFAT not supported by original firmware
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: MK6006GAH (60GB), MK8007GAH (80GB) fit 8mm bay.
- Consider iFlash IDE-to-SD adapter as a modern alternative to mechanical HDD replacement.
- Clicking sounds are a common precursor to hard drive failure in iPods
- Wait 30 minutes while the iPod is charging.
- The sad iPod icon typically indicates a hard drive failure
- Clicking or hard drive whirring sounds indicate a hard drive problem
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.
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. 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 battery, hard drive, cable, or rear case parts. Listen for repeat clicking or repeated spin-up attempts before replacing storage parts. Check whether the iPod enters disk mode, restores cleanly, and is recognized by the computer. If a drive or flash adapter was just installed, recheck cable seating, adapter orientation, and formatting before buying another part. Choose this drive only when clicking, sad iPod, restore, or disk-mode symptoms follow the storage path. Choose this storage drive only when clicking, restore failure, or disk errors follow this part or its connection path. Check battery stability, connector seating, and the hard-drive cable before treating the storage device alone as confirmed. Check the storage cable, adapter setup, battery power stability, and board connector when the symptom changes after reseating or swapping storage.
Should I replace the drive cable too?
Inspect and reseat the drive cable first. Replace the cable when it is torn, creased, loose, corroded, or known to be the model-specific weak point.
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: Flash Storage Mod Kit (iFlash IDE Adapter)Flash storage mod eliminates mechanical failure risk entirely.
Related: Hard Drive IDE Ribbon CableIDE ribbon cable should be inspected during hard drive replacement.
Some buyers search for "frozen iPod"; confirm the checks above point to this same part before ordering.
