A:AnsweriPad mini's have a Lightning connection. I suggest getting a SanDisk iXpand Drive USB key. They range from 16 to 256 GB. They have a lightning connector and USB connector (kinda like a short Lightning cable with a built in flash drive).
A:AnswerYes, I have 2 laptops and have plugged in to both at different times and was able to down load my files from on laptop to the other. Have done a Back Up on both also. Hope that helps with what you need.
A:AnswerConnect the USB from the hard drive into one of the USB ports on your xbox one. Then go into the sgirage settings and change the primary storage to the hard drive
A:AnswerYes, you can download video files from any allowable source and play them back on a TV using a number of different programs. Go to https://mpc-hc.org/ and download their player, it's what I use to play my video files.
A:AnswerYes, this will be compatible with DVRs that accommodate external storage expansion and have a USB 3.0 interface. It will not work if it only requires an internal hard drive.