I am looking for a reliable portable hard disk solution ( a few hundred GBs). Since I am constantly travelling, and all of my important data is stored on that hard disk, and since I have to connect that hard disk to a desktop all of the time, I have to look for a solution that is reliable. External casing with external hard disk doesn't seem to work out, because they always fail and give me all sorts of scan disk/ check disk error.
One thing I don't like about external casing is that the casing and the hard disk inside it gets burnt pretty easily. My experience is that either the casing spoiled all the time, or the hard disk inside it developed bad sectors rather easily. I am also looking into large files backup, but still, nothing beats a reliable portable hard disk.
Edit: The hard disk should not fail easily-- even if it fails, it should have auto redundancy ( something like raid 1)