Multiple storage volumes are no longer compatible with the Microsoft OneDrive cloud storage service, which now only works with NTFS volumes, as multiple Reddit and Microsoft forum users pointed out this week.
If you're using OneDrive with a FAT, exFAT, or REFS disk, you'll likely now see a pop-up message when you try to sync your files. It reads, "OneDrive must be on a drive that is using the NTFS filesystem."
Fortunately, there is an easy fix for FAT users, as OnMSFT notes. They can simply convert to the NTFS file system by typing "convert : /fs:ntfs" into a command line prompt, without losing any data. ExFAT and REFS drives, however, will have to be erased, reformatted, and synced anew with OneDrive to re-download all of your files.
Microsoft did not explain why OneDrive no longer supports non-NTFS file systems, which are typically found on SD cards or computers running older versions of Windows. In a statement, the company said it always intended to ensure that OneDrive users could only store files on an NTFS disk.
"Microsoft discovered a warning message that should have existed was missing when a user attempted to store their OneDrive folder on a non-NTFS filesystem – which was immediately remedied," the company said in a statement to OnMSFT.
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That's little consolation to people who now must deal with the inconvenience of formatting and re-downloading all of their files. OneDrive plans max out at 50GB, which is a lot to download all at once, especially if your Internet service provider imposes monthly caps on your uploads and downloads.
It's also frustrating for users who sync their OneDrive accounts with an SD card in order to supplement the storage space of laptops with small hard drives. ExFAT is the default format for SD cards larger than 32GB.
As Ars Technica notes, Microsoft's decision to make OneDrive NTFS-only may be related to the next Windows 10 Creators update, which relies on features that NTFS supports but FAT and exFAT do not.
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