Where you've run into trouble with data loss and seem concerned with reliability and data loss, the best option for you might be buying an internal drive as your main copy of your data and then also an external drive which you regularly back that data up to. This can be done manually, automatically through a script if you know that kind of stuff, or through a software which does backups automatically.
As far as internal drives go, 4TB is a point where there is actually a speed drop-off in our desktop-grade drives (
BarraCuda). 3TB and smaller capacities are 7200 RPM (Revolutions Per Minute) which is what you generally want in a main internal drive. Starting at 4TB (and larger), the speed of the drives drops to 5900 RPM. So if this is the route you go, your options for 7200 RPM lie in one of 2 directions:
1. Drop the capacity to something like 2 or 3 TB.
2. There is a
Pro version of the BarraCuda which comes with 5 year warranty, 2 free years of rescue services, more robust workload ratings, and all capacities are 7200 RPM.
We don't recommend NAS drives that aren't going to be used in RAID, as RAID is the intended use of these drives and there are certain features that, while ideal for NAS/RAID use, cause the drive to run into errors when used in a different manner. For example: A feature called error recovery control. A normal desktop hard drive encounters an error and it will aggressively try to correct that error. A NAS drive on the other hand, communicates with the controller, and if the drive starts spending a long time trying to correct an error, the controller says "Hey buddy, you're taking too long, I'm giving you the hook" and passes data to the next drive in the array. Great for NAS performance and longevity, but can cause errors to pile up on a drive when it isn't part of a NAS or RAID array.
Which finally brings us to external drives for the purpose of backups. We offer 2 main lineups in this segment, one is called
Backup Plus and the other is called
Expansion. Both have portable versions which run off of USB only, these are convenient for moving around but can be a bit slower (If being used for backups, that isn't necessarily the worst thing in the world), and desktop or hub versions which generally have an AC adapter (plug into the wall). They can be a little faster, but the need for a plug and sometimes their size can make them a bit clunkier and less portable.
Here is a CNET review on the Backup Plus Hub which is useful because there is a chart with performance comparisons on different external drives, you may find it handy:
https://www.cnet.com/products/seagate-backup-plus-hub/review/
Conclusion: a solid route for you to go here is an internal drive + an external to back it all up to. It may seem expensive at first, however the cost of professionally recovering data makes it seem a whole lot cheaper, as those services often run in the high 3 or 4 figures.
Regardless of which brand/route you decide to go in the end, thank you for considering Seagate.