xattrs was their reason, IIRC (even though other filesystems also support xattrs). ETA: > A supported file system is required as Dropbox relies on extended at

xattrs was their reason, IIRC (even though other filesystems also support xattrs). ETA: > A supported file system is required as Dropbox relies on extended attributes (X-attrs) to identify files in the Dropbox folder and keep them in sync. We will keep supporting only the most common file systems that support X-attrs, so we can ensure stability and a consistent experience. [0] [0]: https://www.dropboxforum.com/t5/Error-messages/Dropbox-client-warns-me-that-it-ll-stop-syncing-in-Nov-why/m-p/290065/highlight/true#M18382 https://www.dropboxforum.com/t5/Error-messages/Dropbox-clien...