Wrong allocation values on NAS Systems

Question / Problem

I was scanning my NAS and the 'Size' values seem to be ok, but the values for the 'Allocated'/'Size on disk' are unreasonably high.

Why? And how can I fix that?

Answer / Solution

We discussed this behavior with several NAS vendors, who agreed that this is an issue with the SMB implementation of the specific NAS system.

Please check if there is an update available for your NAS and if it resolves this issue for you. If not, please contact the vendor of your NAS system and ask him to fix this behavior.

As a workaround in TreeSize, you can activate a legacy mode, where TreeSize would estimate the allocated values based on the sizes. To do so, please start TreeSize with the parameter: /UseLegacyEnumerator True