You can move the sync folder to any internal disk, but you can only do this after you have completed the installation of the program.
To change the drive, follow these steps:
1. Right-click the cloud icon next to the clock and select “Settings.”
2: Select the “Account” tab
3: At the bottom it says “Location of Folder Storegate – My Files:”, press “Move …”
4: Now choose where to place the sync folder.