Five recovery routes

External Hard Drive Shows 0 Bytes? Recovery Methods

A 0-byte reading can come from a bad connection, lost mount point, damaged file system, failed enclosure, or physical disk trouble. The safest sequence depends on where the correct capacity is still visible.

By Pjirc Blog Editorial Team Published
Quick answer

Stop writing to the external drive. Try a direct USB connection plus a known-good cable, then check whether Disk Management or Disk Utility shows the disk's real capacity. If it does, image the disk before scanning the image with recovery software.

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Do not initialize, format, erase, repartition, or run repair tools yet. Those actions write to the disk. If the drive clicks, beeps, scrapes, or repeatedly disappears, power it off plus contact a recovery lab.

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★ Editorial pick ★ 4.4 / 5

Image and Scan a 0-Byte External Drive → Disk Drill

Creates byte-to-byte disk images · Scans lost or damaged volumes · Previews recoverable files · Windows plus macOS

✓ Windows plus macOS ✓ Byte-to-byte backup ✓ File preview before recovery
Scan the drive →

When Software Recovery Is Unsafe for a 0-Byte External Drive

Skip scans if the drive clicks, scrapes, beeps, smells burned, vanishes during reads, or never reports its real hardware capacity. Each power cycle may worsen a mechanical problem.

A different enclosure can sometimes expose a healthy SATA disk, but some portable drives use soldered USB boards or hardware encryption. Moving the disk blindly may make diagnosis harder, so leave enclosure work to a lab when the files are unique.

Which 0-Byte External Drive Recovery Method Fits Your Case?

Start with the least invasive option that matches what your computer can still detect.

Method Best for Time Success rate
1. Stop Using the Drive, Then Check Its Connection TRY FIRST Cable, port, hub, or power trouble ~5 min ● 85%
2. Create an Image, Then Scan It With Disk Drill RAW, lost, or unreadable volumes ~30 min+ ● 72%
3. Restore the Drive Letter or Mount the Volume Healthy partition missing from Finder or Explorer ~5 min ● 90%
4. Repair the File System After Recovering Files Stable disk with damaged volume metadata ~10–60 min ● 60%
5. Send the Drive to a Recovery Lab Mechanical or electronic failure Several days ● 65%

Top 5 Recovery Methods for an External Hard Drive Showing 0 Bytes

01

Stop Using the Drive, Then Check Its Connection

Safest first move when the enclosure appears but reports zero capacity

~5 min
Difficulty Easy
You need A spare cable or USB port
Works for Windows, Mac

A loose USB plug, weak hub, bad cable, or underpowered enclosure can make a healthy disk appear as 0 bytes. Start with checks that do not write anything to the drive.

  1. Disconnect the external drive, then leave it unplugged for about 30 seconds.
  2. Connect it directly to the computer rather than through a USB hub, monitor, keyboard, or dock.
  3. Try a different USB cable plus another port. Use the enclosure's power adapter if it has one.
  4. Test the drive on one other computer, but cancel any request to initialize, erase, or format it.
  5. Listen for repeated clicks, beeps, scraping, or failed spin-up. Stop immediately if you hear them.
Disk Drill Review ↗
i If a simple cable swap restores the correct capacity, copy the important files before doing anything else.
02

Create an Image, Then Scan It With Disk Drill

Best software route when the correct physical capacity is still visible

~30 min or more
Difficulty Moderate
You need Disk Drill plus a healthy destination drive
Works for Windows, Mac

Use this route if Disk Management or Disk Utility can still see the drive's real physical size, even though its volume reports 0 bytes, RAW, unallocated, or unreadable. Disk Drill can create a byte-to-byte image, scan storage, preview found files, then recover selected data to another device. (disk-drill.com)

  1. Install Disk Drill on the computer's internal disk or another healthy drive, never on the damaged external disk.
  2. Connect a separate healthy drive with enough free space for the image plus recovered files.
  3. Open Disk Drill, choose Byte-to-byte Backup, select the troubled disk, then save the image to the healthy destination.
  4. Load the completed image into Disk Drill, select it, then click Search for lost data.
  5. Filter the results by file type or date, then preview several important files to check whether they open correctly.
  6. Select the files you need, click Recover, then save them to a different physical drive.
i If the disk disconnects, slows to a crawl, or starts making new noises during imaging, stop rather than forcing repeated scans.
Open the Disk Drill website
03

Restore the Drive Letter or Mount the Volume

Useful when the partition looks healthy but File Explorer or Finder cannot open it

~5 min
Difficulty Easy
You need Built-in disk tools
Works for Windows, Mac

Sometimes the disk is readable at the system level, yet its volume has no Windows drive letter or remains unmounted on macOS. This fix is appropriate only when the partition shows its expected size plus a recognized file system.

  1. On Windows, right-click Start, open Disk Management, then locate the external disk by capacity.
  2. If its partition says Healthy but lacks a letter, right-click it, choose Change Drive Letter and Paths, then assign an unused letter.
  3. On a Mac, open Disk Utility, choose View > Show All Devices, then select the existing volume.
  4. Click Mount if the button is available.
  5. Open the volume, copy critical files elsewhere, then reconnect the drive once to confirm the fix holds.
i Do not create a new volume when the existing partition is missing. That writes new metadata over the recovery target.
04

Repair the File System After Recovering Files

A cleanup step for a stable drive with backed-up data

~10–60 min
Difficulty Moderate
You need A completed backup or recovery
Works for Windows, Mac

File-system repair may restore access when directory records or volume metadata are damaged. Run it only after securing the files because repair utilities change the disk's structures, sometimes removing records they cannot reconcile.

  1. Confirm that important files have been recovered or copied to a different physical disk.
  2. On Windows, open Terminal or Command Prompt as administrator, then run chkdsk X: /f , replacing X with the external drive's letter.
  3. On a Mac, open Disk Utility, choose View > Show All Devices, then run First Aid from the lowest volume upward through its container plus device.
  4. Let the repair finish without disconnecting the drive or putting the computer to sleep.
  5. Reconnect the disk, verify its reported capacity, then open several files from different folders.
i Apple recommends working upward through each volume, container, then device when using First Aid. (support.apple.com)
05

Send the Drive to a Recovery Lab

Right choice for mechanical failure, missing hardware capacity, or irreplaceable files

Several days
Difficulty Easy to start
You need A reputable recovery lab
Works for HDDs, SSDs, external enclosures

Software cannot repair damaged heads, seized motors, burned controller boards, or degraded platters. A lab is the cautious route if the physical disk shows 0 MB, disappears repeatedly, or makes abnormal sounds.

  1. Power the drive off, then stop reconnecting it for more tests.
  2. Write down what happened before the failure, including drops, power loss, water exposure, unusual noises, or earlier repair attempts.
  3. Contact two established recovery labs, then ask whether evaluation is free plus whether charges apply if no useful files are recovered.
  4. Ask how the lab handles privacy, return shipping, replacement parts, plus failed recovery attempts.
  5. Pack the drive in an antistatic bag with firm padding, then use tracked shipping or local drop-off.
i Do not open a hard drive at home. Ordinary room dust can contaminate exposed platters.

Choose the Safest Fix for a 0-Byte External Drive

Creating an image, then scanning it with Disk Drill is the practical software route when the operating system still sees the disk's correct physical capacity. Start with the cable plus power checks because they are quick, free, plus non-destructive. Use mount repairs only for a healthy recognized partition, save file-system repair until after recovery, then choose a lab whenever hardware failure is possible.

Top pick Disk Drill
Confirm whether the system sees the drive's real physical size before choosing any repair. That single detail separates many recoverable file-system problems from enclosure or hardware failures.

External Hard Drive 0-Byte Recovery Questions

Why does my external hard drive show 0 bytes?
Common causes include a failed USB cable, inadequate power, a missing mount point, damaged partition metadata, a corrupted file system, enclosure failure, or physical disk damage. Check whether the operating system still reports the drive's correct physical capacity.
Does 0 bytes mean all my files are gone?
No. The computer may be unable to interpret the volume even though file data remains on the disk. Recovery becomes less likely if the drive has physical damage or new data was written over old records.
Should I format a 0-byte external drive?
Not before recovering needed files. Formatting writes new file-system structures, which can complicate recovery even if you choose a quick format.
Should I initialize the disk when Windows asks?
No, not if it contains files you need. Initialization writes partition information to the disk, so recover or image it first.
Can Disk Drill recover files from a drive showing 0 bytes?
It may help when the physical disk remains visible with its proper capacity, despite a RAW, lost, or unreadable volume. If the device itself reports 0 MB or cannot stay connected, software is unlikely to solve the underlying fault.
Can I scan the original external drive directly?
You can, but a byte-to-byte image is safer for unstable media because later recovery work happens on the image. Direct scanning creates extra read stress plus leaves you with no preserved snapshot if the drive worsens.
Where should recovered files be saved?
Save them to a separate healthy physical drive. Recovering onto the source can overwrite files that have not been restored yet.
Why does the drive show used space but no files?
The folder index may be damaged, permissions may block access, files may be hidden, or the volume may not mount correctly. Recover important data before making structural repairs.
Will CHKDSK fix a drive showing 0 bytes?
It can repair some file-system errors, but it also changes metadata plus may discard damaged records. Use it only after imaging or recovering important files.
Will Disk Utility First Aid recover deleted files?
No. First Aid checks plus repairs storage structures. It is not a deleted-file recovery tool, so secure the data before running it on a damaged volume.
What if Disk Management shows the drive as unallocated?
Do not create a new partition if old files matter. Image the physical disk, then scan that image for the lost partition or individual files.
What if the external drive shows 0 MB in Disk Management?
That points more toward enclosure electronics, USB translation, firmware, or physical disk trouble than a simple file-system problem. Try one cable plus one direct port, then stop if the capacity remains 0 MB.
Can a bad USB cable cause a 0-byte reading?
Yes. A damaged cable or unstable hub can interrupt identification, power, or data transfer. A short known-good cable connected directly to the computer is a sensible first test.
Should I remove the hard disk from its enclosure?
Only if you understand the enclosure type plus accept the risk. Some external drives use soldered USB interfaces or encryption tied to the original bridge board, so removal can make access harder.
How long does a recovery scan take?
A small healthy drive may finish quickly, while a multi-terabyte disk can take many hours. Slowdowns, read errors, disconnects, or weak hardware can stretch the process much further.
When should I use a professional recovery lab?
Use a lab for clicking, scraping, failed spin-up, water or impact damage, a burned controller, repeated disconnects, or irreplaceable data. Power the drive off rather than trying several recovery apps.