I am debating between those Western Digital portable drives that go up to 5tb that function with USB only (WD my passport) and the bigger ones (eg my book) that are bigger and need power outlet besides the USB connection.
Is there any difference in quality or durability to store media?
CMR performs better under all workload types.
Shingled Magnetic Recording overlays the tracks on top of each other like roof shingles. This means you can fit more tracks on the same platter which means you can fit more data. Unfortunately this also means whenever writing data you have to rewrite tracks adjacent to the track you’re rewriting which leads to a lot of reshuffling of data which leads to very slow writes when this is taking place (say you edit a file or replace it, delete some and copy over others).
SMR allows more storage for less money but it takes a serious performance hit (right now about the largest CMR disks you can get as an example are about 28TB in size, by contrast you can get 40TB SMR disks so it can significantly amplify storage). It shouldn’t be used for many scenarios. For archival backup it’s fine. For disks that are having data changed on them anywhere near regularly it’s not great.
I want to underline that for USB powered portable 5200RPM disks they’re already slower disks when CMR, so as SMR they get a lot slower in write performance (one I had would drop down to sustained low 20MB/s write speeds when over 60% full). A 7200RPM SMR disk with proper 12V power from a PSU rail or an AC adapter would likely be double that at worst by contrast.
So SMR has its uses, it has its place. It’s just a lot of people who don’t know might use it in places where CMR is more appropriate and would give them a better experience. So by all means if you’re using SMR in back-up disks to your primary ones to create back-up snapshots that are updated infrequently continue to do so, they’re fine for that especially if the tasks are done on machines that can be left running for days while the data is slowly written.