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Why Files Won't Be Copied to My External Hard Drive?

I use a My Passport External hard drive (1 TB) to store my Raw photo files only. There are 30 folders (takes 275 GB) in that external drive. I attempted to copy about 238 Raw files (about 8 GB in total) from my iMac and paste them into a folder on that external hard drive, but it says I need 60.1 MB to copy the files. I am confused. I have managed to move Raw files from Aperture with no problem. The external disk works to save Raw files without consuming computer space. And it has worked flawlessly until this issue happens. More details, it keeps telling me to manage my drive but when I do, it looks as if it targets my iMac drive rather than the external hard drive. Any idea?

Best Answered by

iBoysoft author Connie Yang

Connie Yang

Answered on Friday, April 12, 2024

As you describe when you follow the warning to manage your drive, it guides you to operate on your Mac hard drive rather than your external hard drive.

Therefore, I think the message that alerts 60.1MB is required for copying the files from your iMac to the external hard drive refers to an extra 60.1MB free of storage space on your Mac hard drive.

Has your iMac run slowly or frozen from time to time? If had, it verifies my guess that your Mac lacks enough storage space to make it perform properly. The insufficient storage space on your Mac hard drive blocks your operation of copying files to the external hard drive.

You need to organize files on your Mac manually to free up more space on the Macintosh HD.

Or you can use iBoysoft DiskGeeker. It is a comprehensive disk management tool that can help you organize and clean up unwanted, useless, and junk files on your Mac within a few clicks.

  1. Free download, install, and open iBoysoft DiskGeeker on your iMac.
  2. Select the Macintosh HD - Data or macOS - Data volume on the sidebar.
  3. Click "Clean Junk" on the right-side toolbar.
  4. Wait for the scanning process to be done.
  5. Select junk files lick UserCache, Downloads, UserAppCache, etc., and then click "Clean" to remove them from your Mac.


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