xamphear proposes a modified version of Xplorer360, a utility created by Roofus AngerWound and allowing you to access all partitions on the hard drive Xbox 360 and Xbox 1 or the memory card. The plus is that you can also write data.
This version can support the new 250GB hard drives and only the latter. You should not use this version to the discs 20, 60 or 120GB.