If you're not finding the external card, then how did songs get on it? Generally though, you're better off removing the songs from the player, editing them on the computer, and then re-adding them when they're fixed. In MSC mode, I can see and access the external card with MediaMonkey and WMP 11....so maybe that could be your answer.
My players:4gb Fuze,8gb microSDHC,2gb Clip
My 'phones:Sennheiser HD201,Koss KSC-75(x2),Sony MDR-V150 (major EQ adj. required)
My amp: FiiO E3
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