if the screen freezes you just flick it off on
if the OS freezes you hold power button down until it reboots
right now im using ap80 pro. it does crash but very rare. maybe once per day
i cant remember how much my ap80 regular crashed. i think about the same.
i think they both crashed and freezed about the same.
screen freezes up 2 or 3 times per day, OS maybe once per day, and crash maybe once per day. a tolerable amount.
most of the time because im hitting buttons too fast
im on latest firmware. you could always install a different firmware.
i had a 256GB red patriot card once and it would not copy files over the usb cable. it would cut out.
all the other sd cards i used worked for copying over the usb cable
ap80 pro seems to get a bit less battery life then ap80, but havnt done thorough tests to prove that yet
if you need help finding more music PM me. i know alot of good bands across alot of different genres
also you might have some bad files that are causing the issue.
i had to
transcode some flac to lastest version flac to fix some metadata issues