When I got my Transcend 32GB SDHC card about 10 days ago, I loaded it up (with 99% Gutenberg epubs) using Calibre's Save to Disk function, then put it in my Kobo WiFi for overnight indexing and whatever else the device does. In the morning I turned on the Kobo and found a few hundred titles nicely arranged in the Books list, and I've had no problems since.
I know there's at least two other means of putting epubs on the SDHC card--"only" another 31GB of space remaining--but I figure there's no need to try them.
I'm using Windows Vista and have been doing all my ebook management with Calibre since I messed things up at the beginning (detailed in another thread) by careless use and syncing with multiple ereader programs/managers (Calibre, Kobo, Sony Reader, ADE).
Keep It Simple!
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