Hi @Evaandabby, if you move files into the Dropbox folder, they'll be synced to the Dropbox site.
When you reinstall Windows and sign into the same Dropbox account again, the files will sync back to your computer.
Therefore, the best option would be to move the files you want into the Dropbox folder, make sure they all have green ticks on them confirming they've synced, and then sign out of the app before reinstalling Windows.
If you need any more details, feel free to message back!
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