Replacement storage path for iPod 3G. 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 (20GB) and its own connector path on the iPod 3rd Generation.
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 Folder Icon, Clicking Noise, Corrupted Data, or iTunes Error; 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.
- Error 1429 during restore can occur after hard drive replacement
- Do NOT use MKXX06GAL series drives -- they are incompatible
- Reformatting the drive can resolve partition table or filesystem issues that cause error 1429 on a new 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 10GB thin-case iPods and the order numbers shown here.
View this option → 15GB / White / Thin Replacement Hard Drive (15GB)Use this linked storage option only for 15GB thin-case iPods and the order numbers shown here.
View this option →This is the 20GB thin-case 3G storage path. Match capacity, drive height, and removed drive marking before ordering.
You're viewing this optionUse this linked storage option only for 30GB thick-case iPods and the order numbers shown here.
View this option → 40GB / White / Thick Replacement Hard Drive (40GB)Use this linked storage option only for 40GB thick-case iPods and the order numbers shown here.
View this option →What 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
- This is the 20GB thin-case 3G storage check. Match capacity, drive height, and removed drive marking before ordering.
- Try a known-good cable, charger, and computer port before opening the iPod.
- Confirm the capacity match before ordering: 20GB.
Specifications & Fitment
Part Details
| Detail | Value |
|---|---|
| Model Number | A1040 |
| EMC | EMC 1961 |
| Condition | Used — factory original Apple part. Normal cosmetic wear expected. |
| Drive Model | MK2004GAL |
| Capacity | 20GB |
| Form Factor | 1.8" IDE/ATA (50-pin Toshiba MCD-D50 form factor) |
| RPM | 4200 |
| Manufacturer | Toshiba |
| Interface | 50-pin Toshiba MCD-D50 |
| Drive Height | 5mm |
| Platters | 1 |
| Height | 5mm |
Compatible Variants
| Order Number | Capacity | Color | Case | Compatible | Notes |
|---|---|---|---|---|---|
| M8976LL/A | 10GB | White | thin | Yes— compatible | Stock match |
| M8946LL/A | 15GB | White | thin | Yes— compatible | Stock match |
| M9460LL/A | 15GB | White | thin | Yes— compatible | Stock match |
| M9244LL/A | 20GB | White | thin | Yes | — |
| M8948LL/A | 30GB | White | thick | No— wrong case depth | Different case depth — choose the listing that matches this order number's case. |
| M9245LL/A | 40GB | White | thick | No— wrong case depth | Different case depth — choose the listing that matches this order number's case. |
is not compatible with
- iPod 3rd Generation 30/40GB thick drive path
- 4G/later iPods and iPod Mini
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
- 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 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
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 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 (20GB) 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
- Reseat or inspect ribbon cable and connector seating
- Check drive noise, SMART/data signs, or storage recognition
- Replace storage or convert to flash storage
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 (40GB) listing instead. |
| You see a folder icon, clicking noise, or restore failure | Start with battery health, charger behavior, and spin-up load before buying storage. |
| Charging, swelling, runtime, or power is the primary problem | Confirm power, charging, and pack-condition clues before replacing this part. |
| 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 | 4G/later iPods and iPod Mini. |
| Cable, computer, sync, or port behavior is the primary problem | Inspect and reseat the cable, latch, or connector path disturbed during service before buying another part. |
- Use only drives from the MKXX04GAL series, such as: - MK1504GAL (15GB) - MK2004GAL (20GB) Do NOT use any MKXX06GAL series drives in a 3rd Generation iPod -- they are incompatible.
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
- MK4009GAL — 40 GB
- MK2008GAL — 20 GB
- MK3008GAL — 30 GB
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.
Check drive-ribbon seating and bumper placement while the iPod is open.
Repair steps
Documented repair-procedure steps for replacing the drive on this model (from teardown guides; confirm against your unit before starting):
- Lift up the hard drive with one hand and carefully disconnect the hard drive ribbon from the logic board.
- Peel back the metallic tape connecting the hard drive ribbon to the blue mounting bracket.
- Peel up the metallic tape holding the hard drive ribbon to the blue mounting bracket.
- Use a spudger to carefully disconnect the orange ribbon cable from the hard drive.
Repair Guide
Repair guide summary: iPod 3rd Generation Hard Drive Replacement.
Show all 10 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 open easily.
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 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. The headphone jack connector is unusually tall. When levering, keep the lower plastic connector body attached to the ribbon cable. Lever between the connector and socket, not between the connector halves.
Raise the hard drive with one hand while carefully detaching the hard drive ribbon from the logic board. Raise the hard drive out of the iPod.
Peel back the metallic tape where it joins the hard drive ribbon to the blue mounting bracket.
With a spudger, carefully detach the orange ribbon cable from the hard drive. In this step, if the cable doesn't come free easily, it may be useful to gently wiggle the cable from side to side.
Raise the hard drive mounting bracket and cable off the hard drive.
Raise the blue and white mounting bracket off the other edge of the hard drive.
Remaining assembly: hard drive remains.
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 MCD-D50 connector
- 5mm height — fits thin case only
- HDD cable(s): 632-0217-A (3G hard-drive cable identifier.
- Upgrade drives available: MK4007GAL (40GB, 5mm) fits thin case for capacity upgrade.
- Consider the iFlash-ATA1 IDE-to-SD adapter (up to 128GB) as a modern alternative to mechanical HDD replacement.
- Use ONLY MKXX04GAL series drives (e.g., MK2004GAL, MK1504GAL)
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 20GB 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.
What first checks matter when an iPod 3rd Generation has battery or power symptoms?
Start with FireWire power and the battery path, not the board. The 3rd Generation uses a 630 mAh Li-Ion battery at 3.7 V, and local failure notes flag FireWire-only charging through the 30-pin dock; USB sync does not charge this model. For Very Low Battery, Apple-logo loops, or no power after parts work, use FireWire, reseat the battery connector, then separate PMU heat, storage, and cable symptoms.
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. 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.
What should I check before replacing this drive?
Reseat the storage ribbon squarely and confirm the latch is closed before replacing the storage device again. Check adapter orientation, case clearance, and capacity/format expectations when using a flash path. 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. Choose this drive only when the storage path remains isolated after ribbon and fitment details. Choose this storage drive only when the part itself was torn, creased, or damaged during service. Check the cable and storage connector path first when the symptom started immediately after a storage swap. Check the exact connector or assembly disturbed during the repair before treating the new part as failed.
Why people land on this part
Also searched as: Stuck on Apple Logo, hard drive restore fails, restore fails with error, drive 15GB, drive formatted, logo appears, hard drive dead, hard drive broken, clicking sound, one click sound, shows a folder, drive was corrupted, hard drive corrupted, folder with exclamation, error 1416, error 1429, click noise, sound and turned, Won't Restore, iPod 3rd generation hard drive upgrade, iPod 3g hard drive, Folder Icon, Clicking Noise, Corrupted Data, iTunes Error, Hard Drive Failure.
You May Also Want
Users replacing the hard drive often upgrade the battery at the same time.
Related: Flash Storage Mod Kit (iFlash-ATA1 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 "iPod classic 3rd generation hard drive"; confirm the checks above point to this same part before ordering.
