upgrade space easely?

Hello, my whonix has 100gb is there a EASY way to upgrade that to 200-300?

No.

Thanks, i tried that but my Whonix is using the vmdk not the VDI and when i try resize i get

C:\Program Files\Oracle\VirtualBox>vboxmanage modifyhd “C:\Users\Administrator\V
irtualBox VMs\Whonix-Workstation-XFCE\Whonix-XFCE-15.0.1.5.4-disk002.vmdk” --res
ize 100000000
0%…
Progress state: VBOX_E_NOT_SUPPORTED
VBoxManage.exe: error: Failed to resize medium
VBoxManage.exe: error: Resizing to new size 104857600000000 is not yet supported
for medium ‘C:\Users\Administrator\VirtualBox VMs\Whonix-Workstation-XFCE\Whoni
x-XFCE-15.0.1.5.4-disk002.vmdk’
VBoxManage.exe: error: Details: code VBOX_E_NOT_SUPPORTED (0x80bb0009), componen
t MediumWrap, interface IMedium
VBoxManage.exe: error: Context: “enum RTEXITCODE __cdecl handleModifyMedium(stru
ct HandlerArg *)” at line 816 of file VBoxManageDisk.cpp

Need to convert the vmdk disk to vdi first.

Btw no need to wait for my reply.

In case more disk space is required for your virtual hard disk, the good news is that you are still a VirtualBox user. Whonix ™ is nothing special; it is just another VM image. Any suggestions you find for VirtualBox will similarly work for Whonix ™. Free Support Principle applies.

Alternative instructions already available on search engines.