If you have a Dropbox Basic (free), Plus, or Family account, files remain in Deleted Files for 30 days after you delete them. If you have a Professional and Business accounts, files remain in Deleted Files for 180 days.
Any devices synced to your Dropbox will resync the previously-deleted files at the next sync time.
Selective Sync is available for all Dropbox users regardless of account type. When you use Selective Sync to stop syncing a folder to your computer, the folder will remain accessible at Dropbox. com and on any other devices on which you use Dropbox.
If you need to access the unsynced folder, you can do so at Dropbox. com, or by returning to your preferences, checking the box next to the folder, and choosing Update—this will re-download the folder.
To open File Explorer on Windows, press Windows key + E or right-click the Start menu and select File Explorer. To open Finder on macOS, click the two-toned smiley face icon on your Dock.
You can restore the file or folder to your computer at any time by right-clicking it and selecting Smart Sync > Local.