exFAT external drives become unreadable on Mac after long Windows use

Hello,


I have been experiencing an ongoing problem with external drives, my MacBook Air M3, and my Windows PC. Whenever I plug an external drive formatted as exFAT into my Windows PC for an extended period of time, and then plug it into my Mac, it will no longer read. Disk Utility will freeze and get stuck on loading disks, and I will have to reconnect the drive to my PC and run the lengthy "Scan & Repair" process just to make it functional again. I have had this issue on two devices: my SanDisk 256GB USB Drive, and my brand-new Samsung EVO SELECT microSD 1TB card. Does anyone know how to fix this so it stops happening? Thank you.

MacBook Air 13″, macOS 26.2

Posted on Dec 27, 2025 11:21 AM

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exFAT external drives become unreadable on Mac after long Windows use

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