Interference-prone equipment, constantly crashes ...

The first few days I still thought the device would be good, but the prolonged use show enhanced error that should not be at a machine in this price range.
The unit turns on during music playback time and again suddenly at irregular intervals and can then be a few minutes no longer do. If the folder menu is operated in order to find a particular song, there are often crashes or serious delays.
I have already posted a device and the second device started to spin so again after a few weeks.
I would advise anyone to the device. Both units I received were not technically sophisticated and at the price I expect not a pointed but a solid product.