From just using portable HDs as backups, I'll from now on start using Google Drive as an extra security measure. However, since it's increased backup security (and not portability/accessibility) I'm looking for, I'm not interested in uploading my files as they are. Not without encrypting them first, as I'd like to protect myself from hacking (and for the sake of privacy in general). What I'd like to do is put all my files in one encrypted disk image which would be around 100 GBs. I would go with a DMG, but if I simply modify one TXT file inside it (which takes up KBs) I wouldn't want it to upload the entire 100GB DMG file again in order to sync it. I recently learned about sparsebundles (haven't used it yet), so if I go with a 100GB encrypted sparsebundle instead of a DMG, would Google Drive recognize incremental modifications that occur inside it, and therefore synchronize accordingly (not the entire file each time)? If Google Drive doesn't, do you know of any other cloud services that do? Maybe Dropbox or something else? Thank you very much.