Can't Move Apps to SD card on SuperSonic SC-75b

[BrentVegas]

o SuperSonic SC-75JB (inexpensive 7" All Winner A-10 CPU. Android 4.1.1--Yes, the version susceptible to Heartbleed!).
-- 512mb RAM
-- 4gb internal storage
-- Microsd slot into which I have placed a 16gb card, which the system recognizes.
-- Micro-USB port. It is possible, using an adapter, to connect a thumb drive, which the system recognizes and will allow user to play various videos without difficulty.

o Looking at "Settings/Storage," I see:
--"Internal Storage . . . Total space 0.98gb . . . Apps 700mb . . . Available 187mb"
--"Internal Storage [again] . . . Total space 1.52gb . . . Apps 442mb . . . Audio 180kb . . . Available 22.70 mb [The math of that doesn't work, does it?!] . . . Erase SD card . . "
--"EXTSD . . . Total space 14.9GB . . . Available 14.89GB . . . Unmount SD Card"
--"USBHOST1" [which shows capacity if a thumb drive is mounted]

o In "File Manager":
-- "Internal Storage": Only folder shown is "sdcard." All other Android operating files are inside that folder. I'm surprised by that folder name, unless the tablet simply uses an sdcard as its internal storage device. I'd have to crack the case to determine that, which I'd prefer to avoid, but am not 100% opposed to doing so.
-- "External Sdcard": Shows the installed 16gb microsd card with one directory "extsd" with one file (which I sideloaded) and the empty LOST.DIR directory Android creates.
-- USBHOST1 icon [nothing attached, so nothing shown]

o Quirks (or so it seems to be to me):
--When trying to move apps to the installed microsd card, the option often available for apps so designed, the system seems to move them only to the 2d "internal storage" category and never to the actual microsd card.
-- With NO apps shown as being on the external/inserted microsd card, if I unmount the card, many of the apps need to be reinstalled, the ones I tried unsuccessfully to move to the microsd card, but seem to end up in the "2d" internal storage.
-- The same thing happens if I mount/unmount the USBHOST1 thumb drive: Same apps need to be reinstalled, yet they were *never* part of the "move to SD card" process; i.e., the USBHOST1 thumb drive was not installed.
-- Those "reinstalls" don't seem to require a full reinstall, because previous settings are often preserved and restored, even though the tablet can't find the app after the unmounting of either storage option.

o My experience of "moving apps to SD card" has been limited to an EVO 4g smartphone (Android 2.3), so maybe I'm just seeing normal behavior for a tablet using a later Android version? Doesn't seem plausible, though, especially in light of the "math problem" I cited.

 

[B. Diddy]

Welcome to Android Central! I think this guide may help answer a number of your questions: http://forums.androidcentral.com/am...roid-memory-how-deal-low-memory-warnings.html

 

[BrentVegas]

Welcome to Android Central! I think this guide may help answer a number of your questions: http://forums.androidcentral.com/am...roid-memory-how-deal-low-memory-warnings.html

Thanks for this great link!

If I understand it correctly, "moving to SD Card" doesn't mean moving to the SD card that has been inserted into the SD card slot? That would explain a lot.

However, why should unmounting either the "inserted" SD card or a thumb drive mounted via USB port, neither of which have anything directly to do with the apps (if that is a correct assumption), cause the "moved to SD card" apps to require reinstallation?

As I mentioned, these reinstallations seem to NOT be full ones; i.e., data associated with the apps isn't lost; but the apps won't run via the usual touching their icons.

 

[B. Diddy]

That's weird. It may be some coding error in the device's firmware that causes those apps to break, even though they're moved to the Internal SD, not the external SD. Perhaps the code is regarding both Internal and External SDs the same way from certain respects. Just speculating here ...