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Time Machine error

S

seanjayy

macrumors newbie
Original poster
My time machine won't back up because it says it needs 348 GB and that my drive only has 3.01 TB. I ran disk first aid on both the computer and the drive which hasn't changed things.

I am using a 27 in iMac 2017 3.4 ghz Quad core with 64 GB of memory. thanks for any suggestions.
 

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That's crazy. Obviously 3.01 TB is over 8 times larger than 348 GB so that message makes zero sense. Does Disk Utility show 3.01 TB of free space for that disk?
 
usagora said:
That's crazy. Obviously 3.01 TB is over 8 times larger than 348 GB so that message makes zero sense. Does Disk Utility show 3.01 TB of free space for that disk?
Click to expand...
Yes there is 3.01 TB free space.

I think I figured it out though. The various drives I was trying were all formatted as EX-FAT because I used these drives on both macs and PCs. Those drives were giving TM troubles. I reformatted another drive as journaled (not case sensitive) and now it seems to be copying successfully although it’s taking a long time.
 
seanjayy said:
Yes there is 3.01 TB free space.

I think I figured it out though. The various drives I was trying were all formatted as EX-FAT because I used these drives on both macs and PCs. Those drives were giving TM troubles. I reformatted another drive as journaled (not case sensitive) and now it seems to be copying successfully although it’s taking a long time.
Click to expand...

Seems like macOS should be able to give a proper error message though, since it obviously knows the formatting of the disk. E.g. "Please reformat this disk in [required format(s)] before using with Time Machine"
 
usagora said:
Seems like macOS should be able to give a proper error message though, since it obviously knows the formatting of the disk. E.g. "Please reformat this disk in [required format(s)] before using with Time Machine"
Click to expand...
I read that that if you leave it up to Time Machine, it will format the drive as Case sensitive which isnt ideal for Time machine.

I am still waiting for this new drive to finish backing up before I declare issues resolved.
 
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