A lot of what people perceive to be stable or not with the X3 hinges on the X3's VERY sporadic and random support for the files they have on the X3.
If you have too many files in too many folders on a level or in some sporadic way, the firmware tends to be much much less stable than if you were to say have 20 songs on the entire device.
"sporadic and random support" for the files types FiiO clearly states they fully support is not something I expected from this device - or any device - even for a device at this price point.
I would also like to point out that the support response I got from FiiO in regard to these playback/performance issues was to prompt me to update to the latest firmware, above all else.
Its been a decade (likely more) since I acquired technology I felt was nowhere near ready for the market/consumer, but the X3 stands out as a conspicuous example of that.
PS: about the "too many folders" bug: Can anyone state exactly which folder configurations are going to cause problems? I have a 64gb card with 74 albums, of which 68 of them are stored directly in the root folder. IE: there are only a few folders for artists that have more than one album inside them. No matter how you look at it, I don't have the oft-mentioned 200 folders on the card yet, and still I have had playback problems every time I use the X3. Is there an ideal configuration that works every time, without fail, or is this still in the territory of "unknown"?
Edited by Cannikin - 1/8/14 at 11:20am