I’ve some problems using USB stick either in rear either in front panel.
There are costant intermittant failure: every 2 or 3 minute a little stop.
I tried to re-format usb stick in NTFS, FAT32, exFAT but without results.
Same problems with mobile usb and usb hard-disk with supply.
Upgrade with last firmware version done.
Any suggestion ?
Second hand but used very little, almost new.
In streaming configuration (wifi and network cable) run ok.
In front in I used an usb with few album, in rear in I’ve an hard disk with 1,5TB of music.
Also my impression is that there is a device issue but I want to be sure that it’s not only a question of configuration or something like this.
I would also suggest as @frenchrooster says to power cycle. Disconnect from the wall, go and make a cup of tea, and come back say 15 miss later to power on. It does sound like a cliche but has solved many weird issues before.