Sector size is more related to physical disk drives than partitions/volumes because file systems in partitions will combine sectors together into clusters instead. The "Allocation unit size" in your screenshot is the cluster size and not sector size!!! To check cluster size see Check the cluster size of an exFAT drive on Windows
Anyway reformat the drive with the same allocation size as the current factory exFAT partition is pointless because allocation unit size has nothing to do with the sector size and depends on your data. For example if you store mostly large media files then choose big allocation size for better performance, and if you use the drive mainly for very small files then you need to choose a small allocation size, otherwise the overhead will be large and things like this will happen
it appears to be one of those fake-capacity chinese USB sticks with firmware crafted to fake capacity, it REPORTS 8TB, but files get corrupted when i tried moving 200GB to it, so it's real capacity is <=200GB
Most fake-sized crappy USB sticks are not even 4GB, let alone 200GB. There's no chance for you to get the data back. Most likely when you write more than the drive's size it already wraps back to the start and overwrite the metadata of the filesystem, making the sector size appears large but it's actually isn't. And you can't find a way to reflash the drive's firmware to get the real size either, so just throw it away
Again, you should just care about cluster size and shouldn't be worry about sector size, but if you're really curious then there are lots of ways to obtain sector size, one of that is by querying WMI with wmic
C:\> wmic diskdrive get DeviceID,BytesPerSector,DefaultBlockSize,MinBlockSize,MaxBlockSize
BytesPerSector DefaultBlockSize DeviceID MaxBlockSize MinBlockSize
512 \\.\PHYSICALDRIVE0
or Get-WmiObject
in PowerShell
PS C:\> (Get-WmiObject win32_diskdrive).BytesPerSector
512
although WMI was deprecated and new code should use Get-CimInstance
instead
PS C:\> (Get-CimInstance win32_diskdrive).BytesPerSector
512
With fsutil
beside sectorInfo
you can also check the ntfsInfo
/refsInfo
outputs if the partition is among those file systems
> fsutil fsinfo ntfsinfo C: | findstr /c:"Bytes"
Bytes Per Sector : 512
Bytes Per Physical Sector : 4096
Bytes Per Cluster : 4096 (4 KB)
Bytes Per FileRecord Segment : 1024
Allocation unit size
is the cluster size, not sector size, and it's a filesystem thing, not related to the disk. Only sector size is defined by disks