Start with the bullet points: It is said proudly in the presentation of the player he is for 2 microSD cards up until 128 GB each, for a total of 256GB Right.. What is not said, however, is that the maximum total number of files supported by the X5 is the ridiculous number of 5800. I know that the very high resolution files take up more space, but for people like carry around with me that "only" the ALAC 16bit / 48000Hz average, 256 GB of this music is much more than 5800 pieces. So I find it dishonest to conceal such information.
Note also the inability to create playlists. The navigation of music tracks is limited to that album / artist / genre. It is only possible to create a single playlist so-called "favorites", the pieces must be shown one by one from the player. Exit therefore long and numerous playlists ...
In terms of sound quality in itself, nothing to say, very good.
The menu is not very explicit, but hey, we expected, it is rehashed in all the forums and grids tests. That's not why we bought this.
Note that a blunder in the main menu could have been avoided: items rotation, controlled by the front wheel, is done in the wrong way. It's not that there is more embarrassing, but it is disturbing, at least at the beginning, and it's stain.