If you just want to back up some files from work on your home desktop, you can use the SMB Share protocol. Look at the videos on YouTube - one in particular “how to share files between multiple Macs. This is done using your home WiFi and is fairly simple. I use it to transfer a folder full of spreadsheets from my iPad to my Mac. You don’t even need to have devices in the same room. I’m usually in my recliner while my Mac is in my home office. I also transfer files from Mac to iPhone the same way. Now & then I’ll move a group of photos that way.