Unsufficient harddisk space to transfer Win 10 VM

Hi community,
I've created a VM from my Win10 system - file is 133 GB. Now I want to install that VM on my Macbook Pro > no chance.. I always get the message that there is not enough space on my hard disk...
As you can see on the picture:


I have more than 260 GB available on my hard disk - the message is totally confusing as I don't know the source of "87,53 available"...

Anyway - I need to get it up and running but have actually no glue where to make any configuration better than I had...
Hope for good hints here,
thx in advance!

Stay safe, stay well
Gerhard