Why is Time Machine not backing up your Mac?
What should you do to fix it if Time Machine wont backup to external drive?
Time Machine Not Backing up
Time Machine is a professional backup utility that comes with macOS.

If you lose data, you might easily perform a restoration.
Now, lets see them one by one.
Time Machine cannot back up data to an external drive with the file system FAT and NTFS.
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Go to check the file system format.
you might go to the drive inFinder, right-press it and chooseGet Info, and then check theFormatsection underGeneral.
Want to format an external hard drive for Mac and Windows PC?

This post will show specific methods to make external hard drive compatible with Mac and PC.
Besides, go to see if your external drive has enough disk space to back up files.
it’s possible for you to go toApple Menu > System tweaks > General.
Then, clickStorage > All Volumes.
This could help to clear something to fix some malfunctions.
Step 1: Click theApplemenu and tap onRestart.
Step 2: UncheckReopen windows when logging back inand then clickRestartto confirm the reboot operation.
Step 1: ClickGo > Utilitiesin the Finder and run Disk Utility.
Step 2: Choose the backup drive and clickFirst Aid.
Then, tap onRun.
you’ve got the option to go to update macOS to see if this can help.
Step 1: Navigate toSystem Preferences > Software Update.
Step 2: After a scan, chooseUpdate Now.
Deleting these files is a good option to help solve Time Machine not backing up.
Step 1: Move toFinderto find your external hard drive.
Step 2: Find theBackups.backupdbfolder, choose all the.inProgressfiles, and move them to the Trash.
Step 3: Empty the Trash and then back up your Mac again.
Final Words
These are the common fixes to solve Time Machine not backing up.
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