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5TB Exfat External drive not mounting

D

drakeznathan

macrumors newbie
Original poster
Jan 5, 2018
7
0
I have couple of 5TB Seagate external drives and 4tb as well. 4TB drive works fine and gets mounted but my 5TB drives aren't getting mounted. I can see it greyed out in Disk Utility, tried mounting, fixing permissions and even tried mounting by downloading Paragon software provided by Seagate for mac but nothing works.

I am using MacBook Pro 13 TB (2017), I am using a good quality USB C to USB A converter and using the same one, my 4TB is detected but no luck with 5TB. I also used these drives with my MacBook Air on a previous version of macOS, the problem seems to be related with the High Sierra because after upgrading my MacBook Air, it doesn't get mounted on that laptop too. Please help me out.
 
The only reason I can think of to use alternate formatting on a Mac's external drive is for cross-platform use. Does the drive work when connected to a computer running Windows, Linux or other?
 
BrianBaughn said:
The only reason I can think of to use alternate formatting on a Mac's external drive is for cross-platform use. Does the drive work when connected to a computer running Windows, Linux or other?
Click to expand...

It was working earlier on mac though. Yes it works instantly on Windows, I have tested rigorously and the drives are absolutely fine.
 
I wonder if it has to do with the capacity. A 4TB external drive wasn't recognized on my parents 2012 iMac and I had to format it on my MacBook Pro from what I remember.
 
It's a known issue that, depending on how big the drive is, formatting exFAT in OS X uses too large of block (cluster) size that Windows doesn't like. Format the drive from within Windows with a block size no larger than 1024 and you should be able to use the drive on both platforms.

Found this on a google search. Not sure if it is true in your case.
 
beachmusic said:
It's a known issue that, depending on how big the drive is, formatting exFAT in OS X uses too large of block (cluster) size that Windows doesn't like. Format the drive from within Windows with a block size no larger than 1024 and you should be able to use the drive on both platforms.

Found this on a google search. Not sure if it is true in your case.
Click to expand...

Drive is working on Windows perfectly fine but not getting mounted on mac
 
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