Recovering deleted files from an external drive on a Mac is possible, but your chances depend on what you do next. Stop using the drive immediately, avoid copying new files to it, and check the Trash and backups before attempting recovery software.
Quick Answer
To recover deleted files from an external drive on a Mac:
- Stop using the external drive.
- Check the Mac’s Trash and any backup services or backup drives.
- If the files are not available there, use reputable data-recovery software and save recovered files to a different drive.
- If the drive is failing, encrypted, or not recognized, avoid repairs that could overwrite data and contact a professional recovery service.
The sooner you stop writing data to the drive, the better your chances of recovery.
Stop Using the External Drive First
When you delete a file, macOS usually removes its directory entry rather than immediately erasing every piece of the file. The space may remain available until another file uses it. Copying files, downloading software, editing documents, or even allowing some applications to create temporary files on the drive can overwrite the deleted data.
Before trying to recover anything:
- Stop copying files to or from the external drive.
- Do not format, partition, or erase the drive.
- Do not run repair tools unless you have determined that the drive is not merely missing deleted files.
- If the drive is making clicking, grinding, or repeated spinning sounds, disconnect it and avoid further use.
- If the drive contains sensitive information, choose recovery software or a service that explains how recovered data is handled.
If the drive is still mounted in Finder, you can leave it connected while checking the Trash, but do not open or modify files on it.
Check the Trash on Your Mac
Files deleted through Finder may appear in the Trash. This is the simplest recovery method because restoring an item does not require scanning the drive.
- Click the Trash icon in the Dock.
- Look for the deleted file or folder.
- Control-click the item.
- Select Put Back.
The item should return to its original location on the external drive. If Put Back is unavailable, you can drag the item to another folder, preferably on a different drive if the external drive appears unreliable.
The Trash does not always contain deleted external-drive files. Files removed with Command-Delete normally go there, but files deleted from Terminal, removed by some applications, or erased from a drive that bypasses the Trash may not.
Check Backups Before Using Recovery Software
A backup is usually safer and more complete than file-recovery software. Check every backup system you use before scanning the drive.
Time Machine
If the external drive was included in Time Machine backups, you may be able to restore an earlier version.
- Connect the Time Machine backup drive if necessary.
- Open the folder where the deleted file was stored.
- Click the Time Machine menu in the menu bar.
- Select Browse Time Machine Backups.
- Use the timeline or arrows to find a date when the file existed.
- Select the file and click Restore.
If the external drive itself was used as a Time Machine backup disk, do not treat that disk as an ordinary storage drive. Its backup structure may require restoring files through the Time Machine interface.
Cloud and application backups
Check services and apps that may have kept another copy, including:
- iCloud Drive
- Dropbox
- Google Drive
- OneDrive
- Adobe or Microsoft application recovery features
- A separate backup drive
- Network storage or a file server
Also check the service’s online trash or deleted-files area. Cloud services often have their own recovery window, but the available options vary.
Use Data-Recovery Software
If the file is not in the Trash or a backup, recovery software can scan the external drive for file remnants. Install the software on your Mac’s internal storage—not on the affected drive—and save recovered files to another disk.
Choose the right recovery destination
You need a separate destination with enough free space for the recovered data. This could be:
- Your Mac’s internal drive
- A different external drive
- A network location
Never save recovered files back to the drive being scanned. Doing so can overwrite other deleted files and reduce the chance of recovering them.
For a large recovery, check the available space on the destination before starting. If you need to inspect storage from Terminal, use a guide such as how to check available space on an external drive in Terminal on a Mac.
General recovery-software procedure
The names of buttons differ between applications, but the process is usually similar:
- Download recovery software from the developer’s official website.
- Install it on your Mac’s internal drive.
- Connect the external drive.
- Open the recovery application.
- Select the external drive or its relevant volume.
- Start a scan.
- Wait for the scan to finish, if possible.
- Use file previews, filenames, folders, or file types to identify the data.
- Select the files you want to recover.
- Choose a different drive as the recovery destination.
- Begin the recovery.
A quick scan may find recently deleted files. A deep scan can search more thoroughly but may take much longer and may return files with incomplete names or folder structures.
If macOS requests access
Some recovery tools need permission to access disks or protected data. macOS may display a prompt, or the application may tell you to enable access in System Settings.
Before granting permission, verify that:
- You downloaded the application from a trusted source.
- You understand what access it requests.
- You have read the developer’s privacy and recovery instructions.
Do not give broad permissions to an application you do not recognize.
Create a disk image when the drive is unstable
If the drive disconnects, freezes Finder, or produces unusual noises, repeatedly scanning it may make the condition worse. A disk image is a sector-by-sector copy of a drive or volume that can sometimes be scanned instead of the original.
Creating an image requires another drive with sufficient free space. It is often best handled by a professional when the source drive is physically failing. Do not initialize or erase the original drive if macOS displays a message saying the disk cannot be read.
Recover Files from an Encrypted External Drive
If the external drive was protected with encryption, you generally need its password or recovery key. Recovery software may be unable to interpret the contents without valid credentials.
Do not erase or reformat an encrypted drive in an attempt to unlock it. If you can still mount it:
- Enter the password when macOS requests it.
- Avoid changing the drive’s contents.
- Copy or recover data to a different disk.
- Keep the password or recovery key available.
For future protection, encryption is useful, but it does not replace backups. You can learn more in how to encrypt an external drive on a Mac.
When to Use Professional Data Recovery
Consider a professional service when:
- The drive is not detected by Disk Utility or Finder.
- It repeatedly disconnects.
- It makes clicking, grinding, or beeping sounds.
- The drive was dropped, exposed to water, or physically damaged.
- The data is irreplaceable.
- Recovery software finds the files but cannot read them.
- The drive contains an encrypted volume and the file system is damaged.
- The drive is showing signs of severe failure.
Before sending the drive anywhere, ask whether the evaluation is free, whether the service uses a cleanroom for failed hard disks, what happens if recovery is unsuccessful, and how recovered data will be delivered. Do not allow a technician to format or replace the drive without your approval.
Troubleshooting
The external drive does not appear in Finder
Open Disk Utility from Applications > Utilities. Select View > Show All Devices and check whether the drive appears in the sidebar.
If it appears but is not mounted, select its volume and click Mount. Do not click Erase.
If the drive does not appear in Disk Utility:
- Disconnect and reconnect it once.
- Try a different USB cable, adapter, or port.
- Connect it directly instead of through a hub.
- Test it with another Mac, if available.
- Check whether the drive requires a separate power supply.
If the drive makes unusual noises or repeatedly disappears, stop testing it and consider professional recovery.
macOS says the disk must be initialized or formatted
Cancel the message. Initializing or formatting can destroy information needed for recovery. Do not follow the prompt unless you have confirmed that the drive contains no data you need.
Recovery software finds files with generic names
This often means the original folder structure or file names were damaged. Use file previews, file extensions, creation dates, and file sizes to identify the correct items. Recover files to another drive and open copies there.
Recovered files will not open
A file may have been partially overwritten or damaged before recovery. Try another recovered copy, check whether the application supports the file type, and test the file on another Mac. If all versions are corrupt, software may not be able to reconstruct the missing data.
The files were deleted a long time ago
Recovery becomes less likely as the drive is used after deletion. Solid-state drives may also use processes such as TRIM that can make deleted data unavailable more quickly. This is one reason to stop using the drive as soon as you notice the deletion.
Disk Utility reports errors
Do not assume that repairing the disk will restore deleted files. If the missing data is important, first preserve the drive’s current state or create an image when practical. Running repair operations on the original disk can change its file-system structures and may complicate later recovery.
Frequently Asked Questions
Can I recover permanently deleted files from an external drive?
Sometimes. If the deleted data has not been overwritten and the drive is readable, recovery software may find it. Recovery is not guaranteed, especially after extensive use, formatting, file-system damage, or physical failure.
Does the Mac Trash store files deleted from external drives?
It can. Files deleted through Finder may be placed in the Trash, although files deleted by Terminal, certain apps, or other methods may bypass it.
Can I recover files after formatting an external drive?
Possibly, depending on the format, the type of drive, how the format was performed, and whether new data has been written. Stop using the drive and scan it from another disk. Do not format it again.
Can I recover files without software?
Check the Trash, Time Machine, cloud storage, application recovery folders, and other backups first. If no copy exists, specialized recovery software or a professional service may be necessary.
Will recovering a file restore its original folder?
Sometimes. A successful recovery can preserve the original name and folder structure, but deep scans may return files without their original organization. Always recover the data to a separate destination.
Should I repair the external drive before recovering files?
Usually not if deleted data is the priority. Repair tools can modify the file system. Preserve or recover the data first, particularly when the drive is unstable or the files are irreplaceable.
Final Thoughts
Start with the Trash and backups, then use recovery software only after protecting the original drive from further changes. Save recovered files to a separate disk, and stop immediately if the drive shows physical failure. Once your files are safe, establish a backup routine so a future deletion does not depend on recovery.