Thread: How to best format thumb drive to put my library on it
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Old 12-01-2016, 11:09 PM   #5
davidfor
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Quote:
Originally Posted by LadyKate View Post
As per my original post, the library is in the folder "2016 Calibre Library". At this time it is the only file in the root directory.

In my main library that I am attempting to backup to thumb drive and as of today there are more than 75000 author folders and a total of over 710,000 files (and over 300,000 folders when you consider the folders below each author). This particular library is almost 350Gig and as the thumb drive is a very slow drive the error showed up after over 16 hours of copying.

The error code showed up when attempting to copy the 26,979th folder. This was after over 16 hours of copying.

I seem to be coming up against fat32 limitations and am looking for suggestions on the best format if I want to be able to copy my entire library (reliably) and to be able to sync to it in future. I would prefer to be able to use the thumb drive on my Windows 10 systems as well as on older systems and Linux.
It's probably directory limitations made worse by the long names.

Each FAT32 directory can have at most 64K files or subdirectories. So, your 75000 author directories will be to many to copy. But, it is worse than that. The 64K is actually the number of directory entries. If long file names are being used, then each file or subdirectory will take up more than one directory entry. And how many directory entries are used depends on the length of the file name.

From what I can see, AnemicOak's suggestion of using exFAT should work.
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