Support a shared Dropbox folder for Windows + Linux dual-boot systems

I use both Windows 11 and Ubuntu Linux on the same computer.

My Dropbox data is stored on a separate NTFS data partition, which works fine with the Windows Dropbox app. Linux can also read and write that partition normally, but the Linux Dropbox app refuses to use it and requires a Linux-native filesystem such as ext4.

This makes dual-boot use unnecessarily inefficient, because it forces users to keep two large local Dropbox copies for the same account, one for Windows and one for Linux.

Please consider supporting one of these options:

• Allow the Linux Dropbox app to use an NTFS Dropbox folder in dual-boot setups.
• Provide an advanced/unsupported mode for shared NTFS storage.
• Support a documented bind-mount or symlink-based workaround for advanced users.
• Provide an official “shared working copy” mode for Windows/Linux dual-boot users.

This would be especially valuable for users with large Dropbox folders where duplicating 200+ GB locally is not practical.