Originally Posted by rebhana

The compressed file seems to have downloaded fine, judging from the file size. But the decompression was incomplete. So just do

Code:

lzma -d MyDocs/debian-m5-v3d.img.ext2.lzma

(This didn't work for you before because "MyDocs/" was missing.)
Perhaps do a reboot first and then make sure nothing else is running during the decompression, which can take quite some time.
Unless your hardware has a problem, there should be no relation to other crashes of apps that you experience.