Hi I have an old iMac that is FULL of photos and home movies. I want to move these to something I can access with a likely soon to be purchased iPad Pro. Would it be better to use an Airport Express with an external drive(s) hooked to it or get a non apple NAS? I don't have either. I want whatever I use to be as reliable as possible without spending too much - $200-$400 Canadian if possible. Easy to use would definitely be a plus too. I just purchased a Time Capsule but am hearing it will be slow to send pics/video - guess I'll use it just for backup. I also have a couple of new 1 TB external drives I could use if helpful. I am looking to store about 1/2 a TB. If a non apple NAS is the best choice any specific recommendations? Thanks much for the help.