I have a small owncloud server on Raspbian and owncloud stores all data on an external hdd drive wich is connected to the raspbeerry pi. Right now I would like to upload all my movies, music etc. to my owncloud, but as one could expect this takes ages (approx. 150GB). Would it be possible to shut down the raspberry and plug the drive directly into my desktop and write the files to the correct directories? Or would this result in errors regarding reading,writing permissions or anything else?