Well, before booting iPhone to recovery mode, and just update, NOT RESTORE will give you access to re-enter your password and gain access to your files, but I don't know if that still works, try at your own risk.
I seemed software problem, but only you will explain better, how does it start, any water-spillage, of electric burn or anything dear, Here is the firmware link, if my guess is right, but, keep in mind in most cases you lost your data after flashing, so if you can give-up you data, give it a try.
Hi, in some cases some apps are ment to be only on phone storage, and to move them to sdcard, your should have a root acces, which you can obtain from some rooting apps, know that rooting might cause damage and voids your device warranty mostly i-root
It seemed your OS isn't, you need to full flash your Device, First, Backup your data and download https://firmwarefile.com/lenovo-a10-70f and flash your Tab, as this indicates A10-70F make sure it's the same as your, 'cause this is what I get, and try at your own risk, goodluck
Well your phone seem to be bricked, if you don't have sensitive data/ will to loose your data, then your hold volume+, home button and power at the sametime and release the power immediately the power comes on, wait to see android logo with options, the use vol-/+ to navigate and power button to select/action and factory reset, note that if frp is on, you need to enter your previous account signed to that enables anti-theft, either google/samsung frp, and in other hand if you can't afford to loose your data then flash 1file firmware, or if 4files just flash the AP/Code.