Right click the USB Flash Drive and select Format.Plug in the USB Flash Drive which will be formatted.Format USB Flash Drive partition using Windows File Explorer Some systems which are less sophisticated ( example : car audio system, audio players) may not be able to detect the files in the Flash drive.ġ. At the same time compatibility of the USB flash drive will decrease. This has been done to increase the read and write speed of files in the USB Flash Drive. It is optimized for use with flash memory such as USB flash drives. Other modern operating system like Linux and Mac should not face any issue in detecting this USB Flash drive. The exFAT (Extended File Allocation Table) file system is a proprietary Microsoft system. The USB Flash Drive formatted with Allocation unit size of 64 KB can be used on computer with Windows OS without any issue. Is that a bad idea to use 4096 bytes for exFAT - keeping it the size that I'm used to using? Should I just stick with the default, 512K.Allocation unit size (cluster size) represents the smallest unit of disk storage space will be used to hold the file data.Īllocation unit size has does impact the read and write speed of the disk.Īllocation unit size of 64 KB gives fast read and write performance in the USB Flash Drive. It appears that I could still specify 4096 bytes (not to be confused with 4096K) as the unit size if formatting it through DISKPART even though that option does not show when using the FILESYSTEMS command (or in the UI). (How does Windows determine the default size for exFAT anyway?) The Mac will format it using 128K as the default, which is still a big difference. That is a big difference! I'm not sure if I like that. The simple solution is to reformat in exFAT with an allocation unit size of. When using exFAT, Windows uses 512K (524,288 bytes) as the default allocation unit size. If format USB drive or SD card, youll see NTFS, FAT32 and exFAT file system.
In the past (and on another 2TB drive) I have always stuck with the defaults Windows has (NTFS & 4096 byte allocation unit size).
Since this won't be used as a "working" drive, I'm not too concerned about speed. The main purpose of this drive will be to back up my files, and sometimes transfer them between my PC and Mac, so it will have many smaller files such as documents and photos, and larger files such as GoPro videos. Before I get into this, I do understand that a larger allocation unit size/cluster size is better for drives that will be storing larger files and read/write can be quicker as well while a smaller size can save space, but read/write may not be as efficient.
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