This disk have approximately 4.6 Gb disk space if you fomatted it as vfat for big files. When you send big files sometimes you can see red indicator flashed. It's not errors. I checked disk and files after copying. All good. It's not a "bug" - it's a features. It's heavyweight disk. I like this disk. And yet, people are jealous when they see this thing :). I bought a blue one to be visible in my engineering chaos on my desk. It is a pity that the manufacturer does not make them orange.
5 TB of storage is an excellent size for traveling and the read and write speeds of the unit are better than I expected. It's heavy and the cover over the connection is clumsy to use. All in all though it's clearly preferable to the G-Force rugged drive because of its faster read and write speeds.