I just bought a brand new USB flash drive and want to format it, but what does Allocation Unit Size mean?

It is an 8GB USB memory stick. There are a few default folders on it and other software that I do not want so I want to format it but it comes up with Allocation Unit Size then a drop down box with loads of sizes. What does it mean and which one should I pick? 512 bytes 1024 b 2048 b 4096 b 8192 b 16... show more It is an 8GB USB memory stick.

There are a few default folders on it and other software that I do not want so I want to format it but it comes up with Allocation Unit Size then a drop down box with loads of sizes.

What does it mean and which one should I pick?

512 bytes
1024 b
2048 b
4096 b
8192 b
16 kilobytes
32 kb
64 kb
3 answers 3