If you’ve deleted some media files from a USB drive or SD card, yet the deleted files still show up, the issue is likely caused by the presence of Windows Recycling Bin or MacOS Trash Can folders on the USB drive or SD card. Fixing this issue requires emptying the contents of these folders permanently.
Warning: The purpose of the Windows Recyclin Bin and MacOS Trash Can is to allow you to recover previously deleted files that you later need. The steps below permanently empties these folders so you will not be able to recover these files again. Proceed only if you are certain that you do not need these files.
To empty the Recycling Bin folder created by a Windows PC, plug your USB drive into the PC, wait for the drive to show up in Windows Explorer. Right click on the drive and select “Properties”. In the “General” tab, click on “Disk Cleanup”. Place a check mark for “Recyclin Bin”, and click “OK”. This will delete the contents of the Recycling Bin on the USB drive.
For MacOS, there is unfortunately no built-in way to empty just the Trash Can on a USB drive; all Trash Can folders on all drives are emptied by default. To empty the Trash Can for all drives, plug your USB drive into the Mac, wait for it to mount. Next choose Empty Trash under the Finder menu or press Command+Shift+Delete. A pop up will ask you to confirm that you wish to empty the Trash Can.