I recently had to reinstall Windows 10 on a desktop. I had the Dropbox folder installed on my D drive, which is a separate physical drive (not a partition) from my C drive. The Dropbox app was installed on C, which was reformatted as part of the reinstallation, so I lost the Dropbox app. Since the W10 reinstallation did not affect my D drive (which contains only data files), the Dropbox folder is still there and is intact. When I reinstalled the Dropbox app, it created a new Dropbox folder on C and synced my files to it. I went to sync preferences and tried to move my Dropbox folder to D, but it (correctly) tells me I already have a Dropbox folder there. I thought maybe something as simple as renaming the Dropbox folder on D and then using sync preferences to move the Dropbox folder from C to D would work, but it didn't. I would appreciate any help in reestablishing my Dropbox folder back to D. (FWIW, the "new" Dropbox folder on C has the Dropbox icon with a checkmark at lower left, and the "old" Dropbox folder on D has a plain Dropbox icon).