Review on MP3 player DIGMA Z4 16 GB, Bluetooth, black by Stanislaw Malkinski ᠌

When I brought this player home from the store and attached it to my computer, neither it nor the computer recognized it as a USB drive. I brought it to the shop and got the exact same one back. The first time, I charged the device and uploaded the files without any issues, but the second time, I was unable to connect to the computer or charge the device. No response after switching USB ports and rebooting the PCs.