as i continue to self-diagnose this problem (until someone who really understands this stuff can help me figure it out), it does appear that there are some crossed wires, and renamed things.
when i attempt to move something from the device storage to the SD Card, it implies that it has done so. but when i go into settings>storage i can see that the memory available on my SD Card has remained the same, while the memory available in "USB Storage" has decreased.
(keep in mind my phone is not connected to the computer during any of this).
so, clearly, things that should be moving onto the SD Card are, instead, moving into USB Memory, which may or may not actually exist. when i use AppManager, it shows me that they are on the SD Card, but, as indicated earlier, settings>storage shows the file to be in "USB Storage".
does this make sense?
can anyone else offer some suggestions so i can have my camera and my apps that require an SD Card (like SwiftKey) back?
thanks!