Extreme Portable SSD 1 TB shows less free space than it should: 258 GB are missing!


I have a San Disk Extreme Portable SSD with 1 TB capacity. There is no data hidden in invisible folders. There are 540 GB of data on it.

But: The Finder and Disk Utility show that 797 GB of data are used on the SSD. Only 202 GB are shown as free capacity.

– Why is that?
– Where is the remaining space (258 GB)?

– How can I release and use the missing memory?

Please see image for details.

Thank you!

Here are two more images of Disk Utility.

Hi @mathiasP,

Have you opened a Support Case? If not opened, for more information, please contact the SD Technical Support team for best assistance and troubleshooting:

Hi! Yes, I have opened a case just now. I will report.