I’ve bought several of these, the most recent to replace one I broke of my own negligence. Great little travel tablet with laptop capabilities.
Refurbished though limits access to about 8Gb of the hard drive which not available to utilize. Further diddling suggests that it is the former “recovery” partition from the factory for wimboot or some such. It is impossible (or nearly so) to modify that partition even at command-line level, though it IS POSSIBLE to assign it a drive letter and view its contents.
Personally I also use this tablet as a field data collector running Carlson Software SurvPC with absolutely no problems.