After switching out my old dying HDD for new drives I tried to recover some of the data off of them. First, the drive I operated off of (a Seagate) will try to boot, and the various partitions are recognized and available, except for the very large partition that served as /home, which is where my beloved data is. Second, my backup drive (a WD), which I haven't had plugged in, but worked fine the last time I did, is completely unrecognised by multiple Linux installations. I tried different SATA cables in different ports on my MB as well as different power connections. I know data can be recovered even after major problems, are there third party services for data recovery? Are there options I could use on my own that I haven't tried? I would rather have the data from the drives and I don't need the drives themselves (both 1TB drives)