I succeeded in doing this once long ago. Then while in the Linux vm I wiped the VM’s partition table, which wiped the physical disk partition table, including windows. Do not recommend.

Get a BeagleBoard! https://www.beagleboard.org/boards/beaglev-ahead

Edit: or a Star64! https://pine64.com/product-category/star64/

Yes a back up is possible. Don’t back up partitions, back up the whole device. All 150+g at once.

Whenever you try to mount the device or the filesystems, make sure to mount it read-only so that no changes are written to the device.

Also, shrinking 84g of data into 32g is definitely not possible. Just changing the fdisk partition table doesn’t shrink or relocate the data. You need a filesystem-aware resizing tool to shrink the filesystem before shrinking the partition.

Hopefully you can just change the partition table back to the original values and get a clean fsck.

I see you’ve met my boss.

I’m living this right now. Bad requirements lead to bad results and lengthy rework.

Where’s that X cursor?