Bluetooth File Exchange -- 9GB of lost hard drive space!

I recently tried to copy a large file from my laptop to my desktop (9.6GB). the copy failed in the middle, and I got a mac os error saying I was out of hard drive space. I had 10.5GB free to start, and by the end I had 36MB.
I can't for the life of me find where this is being used. Does bluetooth create some sort of temporary file when it copies?
Thanks,
aemilia

Your drive never had "500GB" to start with (where 500GB = 500 * 1024^3). It had 500 billion bytes (i.e. 500 * 1000^3) - which is probably close to the 465GiB you're seeing. Those extra 24 bytes add up quickly!
In case you think you were hoodwinked, you should note that Apple (and every other manufacturer) marks every drive capacity figure in all of its ads with a footnote which indicates that 1GB = 1 billion.
FYI... there's a new (5 years old?) abbreviation scheme that attempts to remedy this confusion. It specifies that "GB" means 1000^3 while "GiB" mean 1024^3. Apple would do well to adopt this system...

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