Everyone said good stuff, I used T440 especially the T440p. They are okay and much better than T460. The hardware and assembly are rigid, however, the software part, especially Lenovo apps are rubbish and you want to avoid.
My simple advice, put everything in 1 parent folder, like D:\YOUR NAME and spawn many many subs, and never put anything outside of the folder, end of the day, hit it with robocopy sync to fast local drive, I love Samsung micro sd cards with 60 MB/s they are cheap and durable.
50 GiB worth of backup will take you first run 15 mins, future runs will take seconds. You can automate it via script. You can buy another one and have 2 backups. You can encrypt them, so if they are lost it is okay. I can't tell you how much I trust robocopy and how much it is smart and avoids all Windows file explorer limitation.





