I own several external 2.5’’ HDDs on the 1 TB range where I save my data. Samsung has worked well for me, but now I need more space.
One option would be to buy an external SSD instead of HDD.
Another would be to get an external NVME, but so far I haven’t found cases for them.
Nowadays we even have 1 TB flash drives, should I get one of these instead?
I could also buy 2 0.5 TB micro SD cards instead.
So many options make it difficult to decide.
What brands and technologies do you recommend?
Software is going to be debian based.
Micro SD is probably the least reliable but all these media kind of suck. You need redundancy and frequent testing etc. A pain. I think it gets worthwhile when you have enough data to fill several spinny drives so you can set up a RAID. That means at least 20TB these days. My own stuff right now is on Hetzner Storage Box plus several mongrel servers.