ZXCOPY is likely a DOS or Windows 3.1/95 program.
There are three likely possibilities for what "ZXCOPY 3" refers to. Please check which matches your needs: zxcopy 3 software download verified
But the bunker’s tape drive would spin down permanently in six hours. After that, the last Helix-9 drive head would degauss itself in a scheduled sanitation cycle. No backup. No second chance. ZXCOPY is likely a DOS or Windows 3