Ok, the Glow '21 (Glow4 Gentoo) does use /data/media/0/spsd
Three shell scripts are used for this:
- /system/bin/initial_usb_mass.sh
- /system/bin/ums_open_resize.sh
- /system/bin/ums_close_resize.sh
So, apparently this stuff can grow, so you've got no real limitation.
You can do a mount command:
Code:
$ mount
...
/dev/loop0 5232656 52 5232604 1% /mnt/media_rw/spsd
...
The default is 5G. You can delete spsd, fine-tune initial_usb_mass.sh and have whatever size you want. Down to almost nothing is easy. Removing it entirely takes some cleaning.
My advice (as always) shun UMS.