Replacement thin 20GB hard drive path for iPod 4G Monochrome. Use it for storage failures on this model, such as sad iPod, folder-with-exclamation, clicking or grinding drive noise, corrupted-drive messages, restore failure, or drive detection trouble after the model-local cable and power route have been checked.
Product Overview
Use this listing when you are deciding whether the thin 20GB hard drive is the right storage repair path for an iPod 4th Generation Monochrome. This is the product route readers usually mean when they search iPod 4th gen hard drive replacement, iPod 4th generation hard drive replacement, iPod 4th gen hard drive, iPod 4th generation hard drive, or iPod 4th generation hard drive upgrade for a thin 20GB monochrome A1059.
Readers also describe it as an iPod 4G hard drive, 20GB HDD, 20 gig drive, Toshiba MK2006GAL, Toshiba MK2004GAL, Toshiba 2004GAL, sad iPod fix, Sad iPod Icon, folder icon fix, won't restore, or clicking-drive repair.
The strongest drive clues are a sad iPod, folder with exclamation mark, apple.com/support/ipod icon prompt, loud clicking or grinding, corrupted-drive messages, restore failure, or a drive that still is not detected after the ribbon cable and power path are checked.
The current source set does not support treating a literal red X screen as a 4G Monochrome display state. If you see a red X, re-check the iPod generation before ordering from this listing.
- Compatible Toshiba drives end in 004 or 006 (MK4004GAH, MK2006GAL, MK2006GALC, MK3006GAL, MK4006GAL)
- Put iPod in Disk Mode and format as Mac OS Extended (Journaled) if Restore fails
- The Toshiba MK8007GAH 80GB is a compatible upgrade drive
- Use a USB-to-ZIF adapter cable to test the hard drive externally on a computer
- A compatible upgrade option is the Toshiba MK8007GAH (80GB), which uses the correct ATA-6 pin interface.
- Test the hard drive externally with a USB adapter to verify functionality
- Coconut Battery is a Mac utility that can provide diagnostic information about the iPod battery's health
- If restore fails, format the hard drive via Windows: right-click iPod in My Computer and select Format
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 40GB thick-case iPods and the order numbers shown here.
View this option →What Is Included
Quick Diagnosis: Is It The Thin Hard Drive?
Start here before ordering or when an iPod 4th gen repair turns into storage troubleshooting. A storage warning is a useful clue, but the 4G hard-drive cable, power state, restore workflow, and thin/thick fitment still have to be separated.
| What you see | Check first | Hard drive makes sense when |
|---|---|---|
| Sad iPod, folder with exclamation, or show a folder | Reset first, then check whether the iPod reaches Disk Mode or restore. Inspect the drive ribbon if the unit was opened. | The thin drive becomes plausible when the warning returns after cable seating and stable power checks. |
| Clicking, grinding, or click-of-death noise | Listen near the drive while the iPod starts, syncs, or restores. Separate a smooth spin-up from repeated hard clicking. | A noisy 1.8-inch drive is one of the stronger signs that the mechanical HDD is failing. |
| Corrupted drive, restore process, or will not restore | Try restore only when data is backed up or no longer needed. Confirm the iPod stays powered through recovery mode, iTunes restore, error 1429, disk could not be read, or cannot finish restore reports. | Storage replacement fits when restore failure pairs with folder/sad-icon behavior, clicking, drive detection failure, or repeated requests to hook it to iTunes. |
| No spin or same error after replacement | Check 632-0259-A cable seating, the board-side retaining clip, and drive-end connector before buying another HDD. |
The drive is still possible, but a cable or board-side connector route may be the real fault. |
| iPod 4th gen stuck on Apple logo or reboot loop | Look for storage clues behind iPod 4th generation stuck on Apple logo reports: sad/folder icon, clicking, failed Disk Mode, failed restore, or detection changes after reseating. | Treat as a drive path only when storage evidence appears; otherwise keep firmware, power, and board checks open. |
| Dead, will not turn on, or dies unplugged | Check charger, battery, FireWire/USB power behavior, and whether shutdown happens exactly when the drive spins. | Storage can overload a weak power path, but power-only symptoms are not enough to buy this drive. |
For thin 20GB A1059 4G Monochrome builds only. Match 5mm 50-pin ATA/PATA drive height and order number before ordering.
Do not use this part for: 40GB thick A1059 builds.
Confirm the capacity match before ordering: 20GB.
Confirm the case thickness before ordering: thin.
20GB 5mm source-reviewed drive family includes MK2006GAL and supplier-compatible MK2004GAL; do not describe both as guaranteed OEM drives.
Specifications & Fitment
Part Details
| Detail | Value |
|---|---|
| Model Number | A1059 |
| EMC | EMC 1995 |
| Condition | Used — factory original Apple part. Normal cosmetic wear expected. |
| Storage family | 1.8-inch Toshiba/iPod 50-pin ATA/PATA hard drive |
| Drive height | 5mm thin drive |
| Drive models |
MK2006GAL / MK2004GAL fitment family |
| Cable identifier |
632-0259-A is the hard-drive ribbon/cable, not the drive |
| Height | 5mm |
| Interface | 1.8" 50-pin ATA/PATA |
| RPM | 4200 |
Compatible Variants
| Order Number | Capacity | Color | Case | Compatible | Notes |
|---|---|---|---|---|---|
| M9787LL/A | 20GB | Black/Red (U2) | thin | Yes | — |
| M9282LL/A | 20GB | White | thin | Yes | — |
| PE435A | 20GB | White (HP) | thin | Yes | — |
| M9268LL/A | 40GB | White | thick | No— wrong case depth | Different case depth — choose the listing that matches this order number's case. |
| PE436A | 40GB | White (HP) | thick | No— wrong case depth | Different case depth — choose the listing that matches this order number's case. |
is not compatible with
- 40GB thick A1059 builds
- A1099 Photo/Color models
- iPod Mini and later connector storage
Failure Signs
Sad iPod, folder icon, or support URL at startup
- Buyers may describe it as: sad iPod, sad face, folder icon, folder with exclamation mark, show a folder, showing a folder, apple.com/support/ipod prompt, or why does a sad face with online support come on.
- Check first: reset, Disk Mode access, restore behavior, battery stability, and hard-drive ribbon seating.
- The thin hard drive makes sense when: the same storage warning returns after the 632-0259-A cable and power route are checked.
- A literal red X is not the expected 4G Monochrome warning screen; re-check the generation if that is what you see.
Clicking, grinding, or repeated spin-up failure
- Buyers may describe it as: clicking sound, click of death, grinding drive, hard drive dead, drive not spinning, or noisy HDD.
- Check first: whether the sound comes from the drive area and whether it repeats during startup, sync, Disk Mode, or restore.
- The thin hard drive makes sense when: the mechanical drive clicks or grinds while a known-good battery and cable path are stable.
- A smooth hard-drive whirr is less concerning than repeated clicking or grinding.
Corrupted drive, restore failure, or storage not detected
- Buyers may describe it as: corrupted iPod, hard drive failure, drive was corrupted, drive already corrupted, restore process, finish restore, hook it to iTunes, iPod 4th generation recovery mode, iTunes restore error, error 1429, disk could not be read, disk mode problem, or drive not detected.
- Check first: backup/data-recovery needs, USB/FireWire connection, stable power, cable seating, and whether restore can complete.
- The thin hard drive makes sense when: restore failure appears with folder/sad-icon behavior, clicking, or a drive that remains undetected after reseating.
- Do not restore first if the data matters; replacement and restore workflows can erase the drive.
Storage problem appeared after service
- Buyers may describe it as: after replacing battery, after hard drive replacement, replaced hard drive but still showing folder, after flash mod, worked before opening, drive logic, or still shows folder after new drive.
- Check first: hard-drive ribbon seating at the drive, board-side retaining clip, headphone-jack ribbon strain, and nearby connector damage.
- The thin hard drive makes sense when: the symptom changes when the 632-0259-A cable is reseated or a known-good cable/drive is tested.
- If a new drive behaves the same way, stop swapping drives and inspect the cable and board-side connector path.
Apple-logo freeze or reboot loop with storage clues
- Buyers may describe it as: iPod 4th gen stuck on Apple logo, iPod 4th generation stuck on Apple logo, reboot loop, freezes during restore, freezes when syncing, or skips during storage access.
- Check first: whether sad/folder icons, clicking, Disk Mode failure, restore failure, or cable-sensitive behavior also appear.
- The thin hard drive makes sense when: the freeze is paired with storage access failure rather than being only a firmware, power, or logic-board symptom.
- Apple-logo behavior by itself is not enough to prove the hard drive is bad.
Other Symptoms That May Involve This Part
| Commonly described as | What to check before ordering |
|---|---|
| folder icon with exclamation mark, folder with exclamation point | These warnings mean the iPod cannot reach a usable storage path; check the cable first, then the drive. |
| clicking and grinding, grinding noise, Clicking Noise | Mechanical clicking or grinding points toward the drive after the hard-drive cable has been reseated and checked. |
| boot loop, error 1430, error 1436, error 1439, Do not disconnect stuck, error 10, error 45, error code, error message, iTunes Error, malfunctioning with error | 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. |
| Corrupted Data | Playback skips, freezes, or corrupted data become drive clues when they happen during storage access or sync. |
Related checks
- Replacement Battery (All Capacities): check this part first when the nearby battery check matches the symptom better.
- Replacement Headphone Jack (Thin - 20GB): check this part first when the nearby headphone jack / Hold switch check matches the symptom better.
- Replacement LCD Screen (2" Grayscale): check this part first when the nearby screen check matches the symptom better.
- Hard Drive IDE Ribbon Cable: check this part first when the nearby hard-drive cable check matches the symptom better.
Sad iPod, clicking, restore, or storage trouble
What you may see: People describe clicking, sad iPod or folder screens, restore loops, disk-mode trouble, or storage that will not behave after replacement
Check first: 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
Symptoms changed after repair or reassembly
What you may see: People describe a new problem appearing immediately after battery, storage, display, audio, or control work
Check first: 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
Restore, sync, setup, or frozen-state symptoms
What you may see: People describe restore loops, sync trouble, frozen screens, language/setup screens, or diagnostic states that make a part look suspect
Check first: Separate a one-time software or restore state from a repeatable hardware symptom
- Check whether the symptom changes in disk mode, diagnostic mode, or after a supported reset
- If the state appeared after part replacement, inspect the related ribbon and connector before buying again
Fitment or model-variant mismatch
What you may see: People ask whether a similar-looking part from another capacity, case thickness, or generation will work
Check first: Confirm thin or thick case thickness before ordering battery, hard drive, cable, or rear case parts
- Match the exact model, generation, capacity, and case style shown for the product
- Do not use a symptom to override fitment: a wrong-variant part can create new symptoms after installation
Symptom remains after basic checks
What you may see: The iPod still points back to Replacement Hard Drive (20GB) 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 thin hard drive.
Repair considerations
Repair specialists who work on this model consistently flag these checks before replacing the thin hard drive — they help confirm the thin hard 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 This Hard Drive Yet If...
| Situation | Start here instead |
|---|---|
| Sad iPod plus clicking is the actual combined symptom. | Likely a drive failure; this listing is the right place after cable seating and power checks. |
| The iPod is the 40GB thick A1059 route, such as M9268LL/A or PE436A. | Use the thick-drive path, not this 5mm thin drive. |
| The iPod is A1099 Photo/Color, iPod Mini, or a later iPod Video/Classic with the later ZIF storage family. | Check model number; A1099, Mini, and 5G+ use different storage paths. |
| You only know A1059. | Check the order number, 20GB capacity, thin case depth, and existing drive/cable layout. |
| You see a literal red X screen. | Red X is a model-identification icon, not a 4G Mono symptom. Check your model first. |
| Software restore failure is the only symptom. | Try a computer-based restore or known-good connection first before replacing the drive. |
| The only symptom is dead/no power, poor runtime, or dies unplugged with no folder/sad-icon, clicking, restore, or drive-detection evidence. | Check charger, battery, and power behavior first. |
| The display, dock, audio, or click-wheel symptom is isolated and does not change with storage access or cable seating. | Diagnose that display, dock, audio, or click-wheel path directly. |
| The data matters. | Make a data-recovery plan before restore or drive replacement. |
| A replacement drive already failed the same way. | Inspect the 632-0259-A cable or board-side retaining clip before ordering another drive. |
- The selected drive is not compatible.
- 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).
- Most USB-to-ZIF adapters include multiple adapters for different connector types
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:
- MK4006GAH — 40 GB
- MK6006GAH — 60 GB
- MK8007GAH — 80 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
Set the Hold switch so the orange bar is showing before you open the case.
Release the five retaining tabs along the right edge gently; once they are free, the case should open without prying the whole shell apart.
The rear case is still connected by the orange headphone-jack ribbon. Open the case like a book and pull connectors straight up, not by the cable.
The 632-0259-A hard-drive ribbon and its board-side retaining clip can imitate a bad drive if loose, torn, or damaged during service.
This is the 5mm thin-drive path. Do not force an 8mm thick drive or a tall adapter stack into a thin 20GB shell.
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.
Common Questions
Is MK2006GAL or MK2004GAL the right drive?
Treat both as part of the 20GB 5mm 4G-compatible Toshiba/iPod drive family, but do not describe them the same way. The strongest current evidence points to MK2006GAL as the 4G 20GB factory-era drive, while MK2004GAL appears in supplier-compatible and possible carryover listings. Confirm the exact drive supplied and the thin 20GB A1059 route.
Does a red X mean my 4G Monochrome needs this hard drive?
A literal red X is not the expected 4G Monochrome warning screen. Re-check the model generation first. For this listing, the warning signs for this model are sad iPod, folder with exclamation, apple.com/support/ipod icon prompt, clicking drive, restore failure, or drive-not-detected behavior.
Should I replace the hard-drive cable first?
Inspect and reseat the 632-0259-A cable before buying another drive, especially if the symptom appeared after opening the iPod or if drive detection changes when the cable is moved. A damaged cable or board-side retaining clip can look like a bad HDD.
Can I use flash storage, CompactFlash, or an SSD instead?
Yes, a compatible 4G flash-storage path can be a better choice when you want lower power draw and no spinning disk. Searches like iFlash iPod 4th gen, solid state drive, compact flash, larger hard drive, 128GB SSD, or iPod 4th gen mods belong on the flash-mod path so adapter fitment, formatting, capacity limits, and case clearance are checked together.
Will replacing the drive recover my music or data?
No. A replacement drive gives the iPod a new storage device. If the original drive still has data you need, plan data recovery before restore or replacement because repair and restore workflows can erase the old storage.
Worth Knowing
- A literal red X screen is later-model language. A 4G Monochrome storage failure is better described with sad iPod, folder-with-exclamation, clicking drive, restore failure, or apple.com/support/ipod icon language.
- 632-0259-A identifies the hard-drive ribbon/cable. Check that cable and its logic-board retaining clip before blaming a second drive.
- The sad iPod icon typically indicates a hard drive failure
- Clicking sounds are a common precursor to hard drive failure in iPods
- Wait 30 minutes while the iPod is charging.
- Clicking or hard drive whirring sounds indicate a hard drive problem
Why people land on this part
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You May Also Want
Battery service is commonly paired with storage work while the case is open.
Related: Flash Storage Mod Kit (iFlash IDE Adapter)Solid-state flash storage is the modern alternative to another aging mechanical drive.
Related: Hard Drive IDE Ribbon CableInspect the 632-0259-A hard-drive cable during drive service.
Some buyers search for "4th gen monochrome", "grayscale iPod", "iPod Classic 4th generation", "50-pin IDE", "1.8 inch IDE", "ATA-6", "Ultra DMA 100", "4200 RPM", "single platter", "thin HDD", "U2 Special Edition", "HP Invent iPod", "whirring noise", "HDD FAIL", "SCAN NG", "RD FAIL", "iPod skips songs continuously", "iPod froze", "click noise", "click sound", "Flash Mod Problems", or "My replacement drive installed but iTunes shows error 1429"; confirm the checks above point to this same part before ordering.
