Acer managed to pull off a fantastic little product, especially if you managed to get a 16GB 810 on offer for less than half the price of an iPad mini.
However despite the quad core processor and all that on SSD board memory, they are a little vulnerable to 'stack height' and virtual memory issues.
The best way to avoid these and thus crashes and freezing on start up, is to keep at least 1.2 GB free. When cleaning out then, aim to free up 2.2 gig to give some cushion time to your next check.
Clear out includes gong throiugh apps and deleting memory used for each, but also you can find otjer, large yet hidden folders through the memory menu on settings. Here i found 330 mb for Viber which did not show on the app' settings. deleted withoit any trauma. Noticed of course that images was the big baddie, over 9 gig. Many chat apps store images and videos, so worth chosing out that option if possible or cleaning often.
My tablet had become so full that there was not enough stack and virtual to start up properly. It hung on the first Acer logo screen. This can mean worse news- a corrupted boot sector, which then entails a reboot of the ROM base, factory settings, delete everything to reboot.
However øuckily in my case I could " Unix" start with the volume control up held in, then choose 'fastboot' which allowed the machine to start but at a lower memory use, thus I bought time to check it was otherwise workijng såand discover jsut how muhc memory i was wasting !
w to enter Acer Iconia Tab 8 A1-840 Recovery Mode, Hard reset (Wipe) and Pattern Unlock.
Recovery Mode Acer Iconia Tab 8 A1-840
Turn off the devicePress and hold Volume UP keyKeep pressing Volume Up key then Press and hold Power key about 5 seconds then release itKeep press volume up key until the screen turns on then you will see Recovery modeUse Volume keys to select MenuUse Power key to Confirm.
Try Fastboot first, rewstarting on the top power button only. Firs boot may be a little slow, or it maybe worth both carghjng the device and letting it stand off for 20 mins.s
See if you casn gwet it to work before then going through clear all files and then back to use reboot to affect a factory reset, where the original ROM is loaded and should fix all the boot aectoe issues.
Having cleaned out memory, try restarting with a couple of minutes pause while off. The first full restart ,may takr longer than usual beforee you think that it is atill frozen.