0

I have a folder in Samsung Portable SSD T5 model.

When I connect the SSD to MAC and right click the folder and select Get Info to find the folder size then I see the following: 170 GB (410 GB on disk)

What do those 2 values mean? --Size and Size on Disk

Why is there such a huge difference (I know that my folder only has content of size 170 GB so why is it occupying 410 GB on the disk)? --Because it depends on the Allocation unit size and FileSystem in which the SSD is initially formatted to use.

Is the 240 GB (410 - 170 = 240) unusable right now unless I format the SSD? What is the suggested FileSystem and Allocation Unit Size that I can format the SSD to use, so that it is compatible with both Windows and MAC OS (Windows 10 and MAC Catalina)

firstpostcommenter
  • 141

1 Answers1

1

For unknown reasons, Sandisk formatted their Extreme SSD with a 1024kb allocation unit size, which means that every file you put on the disk uses at least one megabyte of drive space.

Windows would default to 128kb for a disk of this size, and that's what the Samsung uses for their 4tb T7 Shield drive, for example.

EricLaw
  • 447