Rockbox General > Rockbox General Discussion

Empty MicroSD Card Appearing Full

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dabrams:
My 8GB microSD card in my Sansa Clip shows up as full (in Properties) when it's really empty.
How can I empty it?!

Chronon:
Check the file system for corruption.

bluebrother:
And check for a recycle bin created by Windows (or similar).

gbl08ma:
The best way to check that both events suggested by Chronon and bluebrother aren't happening is to use a partition manager (GParted does fine on GNU/Linux) and put the card in an almost-factory-new mode:
First delete all the partitions that exist in the card (and be careful to not wipe your hard drive)
Then create a new partition table. Now create a new FAT32 (which I think is what Rockbox uses, it not then format as FAT) partition that fills the entire card.

Now you can be sure that the filesystem is not corrupt (unless your card has bad blocks, which is unlikely) and that there are no hidden recycle bins or other hidden folders. Obviously this wipes all your data, but as you're saying the card's empty... ;)

bluebrother:

--- Quote from: gbl08ma on June 20, 2011, 02:13:06 PM ---The best way to check that both events suggested by Chronon and bluebrother aren't happening is to use a partition manager (GParted does fine on GNU/Linux) and put the card in an almost-factory-new mode:
First delete all the partitions that exist in the card (and be careful to not wipe your hard drive)
Then create a new partition table. Now create a new FAT32 (which I think is what Rockbox uses, it not then format as FAT) partition that fills the entire card.

--- End quote ---

I wouldn't recommend doing this.

Flash memory works in blocks. When formatting flash based memory you need to take that into account, and a lot of formatting tools don't do this. Ignoring the block boundaries will make the card much slower, so I'd avoid formatting it as much as possible. Besides, there is really no need to format the card -- formatting won't tell you about filesystem errors, and checking for hidden files can be done without too.

And the file format used on SDHC cards is FAT32 as per SDHC standard.

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