I have a Motorola Droid Turbo phone. I'm always running out of storage. It does have the option of plugging a flash drive in the bottom, but it can't stay plugged in. I have tried wireless flash drives, but it worked bad. It worked on wifi. I wonder why they haven't made bluetooth flash drives. But, what would be most convenient is to just have an app that gives me more storage. I know all the dropbox but those you have to open the app, then upload them, then delete the files. I would like a way to just mount a cloud filesystem to the phone so the phone just thinks it's internal storage and the app takes care of uploading and downloading it from the cloud. Is there any such app?