Default Question about External SD card visability

So, I am total stock, not rooted yet, waiting for the 2.22 firmware update from TMO.

I have a 64 gig sd card in the phone, and, in apps like root explorer, I can see the card, and all the files I put on it.
I also have been able to move a few programs to the external card, at least partially.

but, in some programs, when I try to save a file to the external sd, or, sometimes when I try to open a file on the external sd, the card does not show up in the path. I have some movies on the card, and when I open BS Player, it doesnt show the external sd card at all.

I think I read that rooting the phone will fix this, but I am not sure if just rooting fixes this, or if you have to do something else to make it show up all the time.

I know there have been issues trying to write and save files directly to the external sd, but I think this is something different.

Thanks in advance!
HTC One M8
LG Flex
HTC One Maxx
Samsung Note2
Samsung Note
Samsung S3
HTC Evo 3d
HTC Evo 4g
Samsung G2
IBones 3,4
Palm Treo
PPC 6700
HP IPAQ
Moto StarTac's, several
BlackBerry's, several
and on and on...



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