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Old 11-02-2012, 08:44 AM   #1
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Default How much space on a 16 Gb. flash drive after formatting?

I need to put the data of 3 full DVD's (4.37Gb. each) on flash drives.
Will 16 Gb. drives be large enough?
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Old 11-02-2012, 09:01 AM   #2
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Should be. My 16GB Mushkin drive has 14.9GB of space formatted as FAT32.

You'd need to format them as NTFS to get around the 2GB filesize limitation.
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Old 11-02-2012, 09:18 AM   #3
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16GB is ~14.9GiB (Windows uses GB even though in fact is it GiB), so you should be able to fit three DVDs just fine.
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Old 11-02-2012, 09:04 PM   #4
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Here’s the interesting thing: it depends on the manufacturer as to how much is usable.

I have three different brands of 16GB flash drives, and all three have different amounts of usable space. The lowest of the three has 14.4GB.
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Old 11-02-2012, 10:01 PM   #5
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Quote:
Originally Posted by BFG10K View Post
Here’s the interesting thing: it depends on the manufacturer as to how much is usable.

I have three different brands of 16GB flash drives, and all three have different amounts of usable space. The lowest of the three has 14.4GB.
Care to name names?
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Old 11-02-2012, 10:52 PM   #6
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Care to name names?
Emtec, Imation, Strontium.
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Old 11-02-2012, 11:18 PM   #7
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Hmm, weird, I can understand different levels of OVERprovisioning but to have half a gig go missing in user-accessible space is bizarre.
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Old 11-04-2012, 05:46 PM   #8
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Quote:
Originally Posted by BFG10K View Post
Here’s the interesting thing: it depends on the manufacturer as to how much is usable.

I have three different brands of 16GB flash drives, and all three have different amounts of usable space. The lowest of the three has 14.4GB.
have you tried a quick format on them?
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Old 11-05-2012, 01:29 AM   #9
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have you tried a quick format on them?
Yes, they've all been reformatted to exFAT. Out of the box they were FAT32.
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Old 11-05-2012, 10:09 AM   #10
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I've noticed that I ALWAYS seem to "lose" space on a flash drive, when I format it in Windows 7. Doesn't matter if I use the HP format tool, or just Windows' built-in format.

Somehow, the mfg is using a FAT32 formatting tool that formats out to more space.

At first, I thought that my testing with vconsole.com 's USB testing (low-level write/read tool) was causing the flash drive to remap bad sectors, and then a subsequent high-level format was showing the effects of that, but when I did that three times to three different flash drives, and their original and new format sizes were identical (Edit: Between the three flash drives - the after format size was smaller than the original though), I realized that it wasn't just bad sectors. (What are the odds that three flash drives have exactly the same number of bad sectors mapped out during a write pass?)

I figure it has to do with the offset that Win7 uses when formatting things, compared to XP and DOS.
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