Is there a reliable way to install Dropbox so that all local files are on removable media instead of my computer's on-board hard drive? I followed instructions for launching Dropbox from the external SSD, and that worked for awhile. Than one day, my computer's hard drive space was almost depleted, and Dropbox files were no longer on the external drive. They had been transfered to the main hard drive, and it took awhile to figure out where they were stored. (Computer registered them as "system files").