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swampcholla Author

Level 1

8 points

exfat partition suddenly missing when using win10

I have a 2020 Macbook pro. The drive is partitioned with a Mac partition, a bootcamp partition with a new install of win 10, and an exfat partition with ALL of my data so it is accessible by applications on both OSs.

This worked fine - used it as a Mac and as a windows machine this weekend within minutes of each other with no issues. Then tried to use the windows side yesterday and the EXFAT partition no longer shows up. It's there on the Mac desktop though.

Other wierdness - I have a very old Mac mouse and a BT mouse that will work on either OS. Now, the Mac mouse only works on Windows and the BT mouse only works on the Mac OS.....

MacBook Pro 16″, macOS 10.15

Posted on Oct 8, 2020 9:35 PM

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23 replies

Loner T

Level 9

59,526 points

Oct 9, 2020 6:09 PM in response to swampcholla

Are you able to mount the partition?

swampcholla Author

Level 1

8 points

Oct 9, 2020 8:32 PM in response to Loner T

I can access it on the mac side - read and write.

but since I can't see it on the PC side other than in the disk manager, I don't know what you mean.

Loner T

Level 9

59,526 points

Oct 10, 2020 7:01 AM in response to swampcholla

Can you run diskpart in Windows and post the output of

list disk

list volume

swampcholla Author

Level 1

8 points

Oct 10, 2020 5:26 PM in response to Loner T

I'm sorry - you'll have to help me with the specific syntax, I'm not seeing it, don't want to screw up

Loner T

Level 9

59,526 points

Oct 10, 2020 8:48 PM in response to swampcholla

In diskpart...

select volume=1

assign letter=f

online volume

and check if you can see the exFAT partition in Windows Explorer.

Loner T

Level 9

59,526 points

Oct 11, 2020 3:40 PM in response to swampcholla

APFS has it's own challenges, but should be usable. exFAT partitions are not resizable, but GParted can. If you use Paragon, I highly recommend good external disk backups.

swampcholla Author

Level 1

8 points

Oct 11, 2020 4:05 PM in response to Loner T

I'm assuming that when I reformat the exfat to APFS then I'll be able to re-size it?

swampcholla Author

Level 1

8 points

Oct 11, 2020 4:27 PM in response to Loner T

Yes. Now I just have to figure out how to do it.

A lot of specialized jargon in all of this - that's why I never pursued programming when it was just a sideshow back in 1979.....

Thanks again.

exfat partition suddenly missing when using win10