SanDisk Professional 6TB G-Drive Project - External HDD, Thunderbolt 3, USB (10Gbps), 7200RPM Ultrastar Hard Drive, Up to 250MB/s Read - SDPHG1H-006T-NBAAD

I took a chance and bought this from the used/return pile for $120 cheaper. I think I got a good deal (fingers crossed). I backed up all three 2TB drives I have on my Lenovo P17, so I could replace them with 4 TB drives. That worked flawlessly. HOWEVER, I had assumed that I would also be able to connect this drive to my slightly older Lenovo P50 which has a regular USB-C port. I had assumed it would just be slower. But, no, it did NOT recognize the drive at all, not even under Disk Management. I tried several cords and concluded that this device ONLY works with a "real" Thunderbolt port and "real" Thunderport cable (look for the lightning bolt). I would be happy if someone would tell me I'm wrong, because, for me, having a backup means you should be able to read your data with your old laptop if your new laptop gets lost or stolen. I didn't even notice that this thing has a slot for an additional "pro-blade" drive, which could be useful. Most of my data are high-res photo scans and videos, so it would be nice to have different libraries on different pro-blades, but again, only if I can access them from more than one computer... and if the price for those came way down.