Using a .vhd image in the VM will crash the VM in Linux

[livefreedead]

I have a VHD file that is 80gb, I use it to transfer to and from my Linux Mint v22 Host and the same Guest OS, in a windows host I am able to do this without an issue. But using a Linux Host I've found that my VM crashes when I try to copy to or from the VHD, especially if I attempt to do other things. it happens almost every time, I;ve had multiple installs and it's occurred on Linux Mint v21 and v22 and on Virtualbox 7.0.18 and 7.1.0. I am just reporting this bug as a way to get things off the VM to the real HDD is essential.

[livefreedead]

I just tested in 7.1.2 and the VHD still crashes if I read or write over 800mb of data at once. It must be relating to buffers/cache or something like that. to be clear, the VHD is just made with VirtualBox and mounted as a 2nd disk after the guest OS is installed, so that I can transfer things without needing to install guest tools and use the network. I am trying to make a Linux Respin and the only way to get the builder on without having to install guest tools and add users/groups etc is via a VHD or a ISO mounted. which I can't copy from the VM to a ISO. It is stable as a rock on Windows Host on any version and even in Linux it works sometimes and never crashes the Host, but the VM guest just locks up, not even Ctrl+Alt + F1 - F7 can get to console etc. I have the VHD file on a separate M.2 NVME drive to my VM's HDD (also a M.2 drive though).