The software supports both HFS+ and APFS ... create a boot drive to use as an emergency disk to help recover data to an external hard drive, but the web server that hosted the file not working ...

While external disks are helpful for additional storage, they aren't reliable, being a full-fledged single backup solution. I learned this the hard way after literally losing year ...

“Stellar Data ... drive that contains the lost files, your computer can overwrite the data, preventing restoration. Stellar’s customer support is the best I’ve experienced for data recovery ...