Can the Memeo backup software work with a laptop, Pryon, and HP PCs (all on a common WiFi system) to a Seagate 1.5 TB portable hard drive?
According to the information found on the official website, the software supports multiple backup plans and destinations, which means that it should work with all the devices that you've mentioned in your question. It also features a cloud option that can be used to access the files remotely for when you're not at home.
For more information, access the following website: https://memeo.com/backup-products/memeo-premium-backup/