Time Machine can't complete backup

fishysammay Said:

"Time Machine can't complete backup: [...]I went into Disk Utility, selected the SSD and tried to Mount, but an error message came up saying it couldn't. What else can be done. The SSD shows up in Disk Utility, but not in Finder. Thanks."

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Thank you for the photo.

If you can't Mount a Drive...

Can you use this drive on any other computer, including a PC? If not, I'd say your hard drive has apparently failed. So, get this serviced. Taking it to a retailer, you may be able to get data taken off of it through lab service.

fishysammay Said:

"I connected it to a PC and it showed up as a USB drive on the right side of the task bar, but it wasn't visible when I opened the yellow folder. [...]I brought it back home and erased it with my Mac and created a new Time Machine Back Up.[...]"

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Formats being the Culprit:

You would need an exFAT format for it to be readable on a Mac and on a PC. Just to be safe, run First Aid once more.

fishysammay Said:

"Time Machine can't complete backup: [...]now when I connect the drive, Time Machine is telling me, 'Time Machine couldn't complete the backup to ... The backup disk could not be found. Make sure the backup disk is connected or select a different backup disk.' When I look in Disk Utility, I see the SanDisk there.[...]"

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Troubleshooting Drive Inaccessibility:

Three Things to Try...

A. Start with a Restart:

Restart your Mac, and see if it then is fixed.

B. Refresh Finder:

1. Go To: Apple menu
2. Select: Force Quit...
3. Select: Finder
4. Click: Refresh button

C. Unmount, then Mount the Drive:

Boot into Recovery Mode. (Silicon Chip or Intel Clip): Then, using Disk Utility, see if the Hard Drive is seen. If it is, then see if you need to click the “Mount’ button for it. Try rebooting once more. If of no success, then click unmount button, and then the mount button. Try rebooting once more.

fishysammay Said:

"I'll try to connect it to another computer tomorrow. It's only 3 months old. In Disk Utility, I ran First Aid and got a green checkmark and 'Operation successful.'"

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Thanks for the update.

Reply back, letting us know how the connection goes.

Create a New User:

Try creating a new Administrator user for your computer. See if it is then seen. If so, it is an issue with the current use. If not, then it is a system-wide issue.