Windows 10: Allocation unit size when formatting USB flash drive

Hi: I am currently involved with transferring music MP3 files to a 32-GB thumb drive and have needed to reformat the thumb drive several times during the troubleshooting process that I am dealing with. I do not know how to make an intelligent choice for the Allocation unit size, and why. Also, I want to learn how to set/reset the File system (Default) settings. Presently, the File system is showing as FAT32 (Default) and the Allocation unit size is showing as 16 kilobytes (cluster size). Are those selections appropriate for the task at hand? Is there a tutorial/blog available that would provide insight to those formatting selections? TIA.

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Allocation unit size for USB flash drive 32GB

The default "Allocation unit size" setting is automatically detected, so do not change the setting.

 

Allocation unit size for USB flash drive 32GB

I just bought 32GB usb flash drive and i want to format it, but i dont know what default Allocation unit size for formating it and also i've no idea what it means.
Here a screenshot



I hope you guys can explain and help me decide which one should i choose. And sorry if this off topic. Thanks in advance.

 

Allocation unit size for USB flash drive 32GB

Basically, the allocation unit size is the block size on your hard drive when it formats NTFS (default 4096 bytes). If you have lots of small files, then it’s a good idea to keep the allocation size small so your harddrive space won’t be wasted. If you have lots of large files, keeping it higher will increase the system performance by having less blocks to seek.
For example:
with a 1 byte file size will occupy 4096 bytes if allocation unit is set to 4096 bytes while it will occupy 8192 bytes if you set it to 8182 bytes.

For flash drive. You can either format with NTFS or ExFat. However, NTFS on flash memory has been known to be inefficient. exFAT’s smaller footprint/overhead.