I can see what's inside vma.gz?

[inomaratadeath]

on proxmox deployed VM Nas4free. It's archive copy takes up more space than that occupied by the data inside the virtual machine as prvoerit which takes capacity?

 

[LnxBil]

The storage is exported raw and if there was data on the disk before (even deleted data), the storage on disk is bigger than inside the VM. Please consider shrinking your qcow2 image:

https://pve.proxmox.com/wiki/Shrink_Qcow2_Disk_Files