First you're in violation of Target's IT and VPN Network terms if you use iCloud on a Mac OS. They look for those connections and will remind you if you have any activity going to your iCloud accounts. This happened to me 5 years ago when I realized that I was automatically signed into my iCloud account and received a "nice" note from IT reminding me that iCloud access from Target's systems was not allowed--cause they can't control it.
second, the network in all lowercase in your finder is your base User folder in Mac OS. the finder is finding it 'cause you're signed into iCloud. So no, Target did not set that up.
If you have a Mac at home for your personal device transfer any docs you need via airdrop right now, and don't send them to yourself. then LOG OUT OF iCloud as soon as your done.
I was laid off a few months ago and this was my workaround that was successful.
good luck
and sign out of iCloud!