In my game, party members have a stress gauge that needs to be monitored during battle. The more stressed a character is, Skills will cost more SP to use and you'll loss a bit of HP per turn. on the flip side, a relaxed party member will heal their HP and skills will cost less to use.
The hard drive wouldn't come out of the old computer I'm disposing of, so I opened up the hard drive itself, then dented the discs with a hammer and poured a solution of water, salt, and vinegar to corrode the insides.
The hard drive had already failed more than a decade ago, so I can say it's safe to dispose of.