I'm currently using my iPad Pro as my primary computer. So far so good - my only issue is giving files to others, and backing up/accessing extra files. Because of that, I'm looking for two things. The first, an iPad compatible hard drive. Wifi, lightning, whatever. It just needs to work for backing up files and for accessing extra files when needed. The second, a flash drive with both a USB and lightning option. Something I can stick pdfs and documents on for easy transferring to those not using iOS or macOS. What do you guys recommend?