How to format a thumb drive on Mac for use with Windows?
Solved Data Recovery
RK
Rachel Kim
November 19, 2021
2 replies
4,690 views
Reviewed by moderators

Formatted a USB drive on my Mac and now my Windows PC and the office printer will not read it. I need one drive that works on both Mac and Windows. What format should I use and how do I set it without losing the option later?

Accepted Answer
Verified by Kerry Morris, Forum Moderator ยท Reviewed November 2021

The Mac probably formatted it as APFS or Mac OS Extended, which Windows cannot read.

1
For cross platform use format as exFAT. Both Mac and Windows read and write it, and it has no 4GB file size cap unlike old FAT32.
2
On Mac: Disk Utility, select the drive, Erase, choose exFAT as the format, and set the scheme to GUID Partition Map.
3
Back up anything on the drive first, formatting wipes it. If you already lost files to the earlier reformat, a recovery tool can often still pull them back before you reformat again.

exFAT from Disk Utility and it reads on Windows and the printer now. Solved.