External Drive for Apple laptop - deleting some files

Using an external drive with an Apple laptop is a convenient way to store backups, documents, photos, and other important files. However, some Mac users may find that they can no longer delete certain files from an external drive, even though deleting files worked normally in the past.

One common situation involves backup files. For example, after confirming that a monthly backup was completed successfully, you may want to remove older backup copies and keep only selected backups. A WD Elements external drive can be used for this type of storage, but file permissions, backup software, or the drive's format can sometimes prevent files from being deleted.

Check the Drive Permissions

Start by connecting the external drive to your Mac and opening Finder. Right-click the external drive and select Get Info. Look under Sharing & Permissions to see whether your account has permission to read and write to the drive.

If the drive is read-only, macOS may prevent you from deleting or modifying files.

Check the Drive Format

The drive's file system can also affect how your Mac interacts with it. Some formats provide full read-and-write support on macOS, while others may have limitations depending on how the drive was formatted and what software is being used.

Check Backup Software

If the files are part of a backup system, they may be protected by the backup application. Avoid manually deleting backup files until you understand how the backup software manages them. Removing files incorrectly could affect future backups or make a backup set incomplete.

Restart and Test Again

Safely eject the external drive, reconnect it, and try deleting a non-essential test file. If the problem continues, check the drive for errors using Disk Utility.

Final Thoughts

If you previously had no trouble deleting selected backups from your external drive but the behavior recently changed, investigate permissions, drive formatting, and backup software settings before deleting important data. Always maintain at least one verified backup before removing older copies.