I've noticed this with multiple LG Devices, its an issue with LG's crap and its like it 'cant see' the sdcard, but at the same time, it still can. Its weird. Usually on the ally a reboot fixed it.
I help maintain CM11 for the LG Spectrum.
LG VX8300>LG Decoy>LG Dare>LG Ally>Droid2>LG Ally>HTC Droid Incredible>HTC Thunderbolt>HTC Droid Incredible>Samsung Galaxy Nexus>LG Spectrum>Moto Droid RAZR Maxx>Samsung Galaxy S4
I'm located in: Computers&IT, LG Spectrum, XDA Developers; AllyIRC My Blog
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