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OK, I can describe what I am doing and what works for me that allows me to have
thousands of e-books and other documents on an SD card that I can read with my JBL.
First using a regular 2GB SD card formatted with FAT32. SDHC cards are fine, but the
JBL doesn't require much in the way of high performance or a high "Class Number"/write
speed.
Second, I make use of my PC's file management functions (XP pro) to build a file structure on the SD card. I have an internal USB2 multi-format 3.5" media reader/
writer, that can work with SD cards. The root directory includes the two required
folders: "Books" and "Pictures" (just used as an occasional scratch folder, not part of
my created library of ebooks structure).
Most of the remaining folders in the root directory of the SD card, contain the actual
ebook files. (.pdb, epub, .rtf, .txt, .pdf, ect...) I have a couple of large manuals that
are HTML "ebooks"/folders that contain the .html file and all the support files/folders of
the "ebook"/manual. I generally avoid a structure that involves folders within folders, as
much as I can. I have a couple that have three folders to reach the actual ebook file,
not something I would recommend.
I think the simplest and most direct structure, with the least problems, is to just have
the root folder of the SD with one layer of folders that all contain the ebook files and no
folders.
Many of the ebooks on my JBL are .epub files that were created by "Calibre" using the
"JetBook 5-inch" output profile, after they have been disinfected of their DRM and converted form their original format. (By "on my JBL" I mean on the SD card in my JBL.)
Almost all the old .pdb ebooks that I had for my Pocket PC PDA/GPS were just dragged
and dropped into an SD card folder (in fact most of the folders were named to match
the categories I had for those ebooks.) There are thousands of those alone, that read
just fine off the SD card, without any modification at all.
There have been an occasional ebook that just seemed to want to be a problem,
usually all that would be needed would be to run it through "Calibre". A really rare hard
case or an exceptionally large and complex document might need to be unzipped/deconstructed then have image files or formatting adjusted to work with the
JBL's display. Then such an ebook would likely be handled as HTML.
Plug the SD card into a reader on your PC, to do all your file maintenance. Do not use the USB Cable for anything except messing with built-in user data memory. Do not use the JBL's SD card file management function. (It's probably safe to use it to just delete
a file.)
Luck;
Ken
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