Firmware 020135A Update

I downloaded file, no installer used, unzipped mp30pa.bin and copied to my clip F:/ since in MSC mode. Update worked fine. But i was surprised to see the file no longer there. Is it only to update and then disappears or is it stored somewhere?

I have 3 Clips to update but no problem for I always work with a copy for just such unforseen circumstances, but was curious.

Yes, the .bin file will disappear after installation.