Only 2TB? Ish? Well, then, the world is your oyster!
Here are some top level things to think about. Every situation is different, so, if at some point you want to dive in post some details about what you want and what you need and we can help.
So, for storage, ya gots options. It all depends on how much data it is, how often you access it, how many people access it, how critical it is to you and your family’s livelihood, and how much you want to spend.
Storing disks on a shelf is scary for me. It may work for others, and thats great. But, my house’s temp/humidity/dust is super off the charts sometimes and with the risk of local flooding and fire then and that my data is very important to my family’s livelihood, I’m going to make a different choice in my situation.
The most basic option is some kinda direct attached storage (DAS). DAS can have the best performance of all the disks, but, are attached to a computer and doesn’t give you a ton of options if you have more a few computers that want to use that data. A 4 disk array would give you slower performance but the ability to either RAID 5 the lot, or maybe even RAID 10. There are loads of these out there, but the 2 most common are the Promise Pegasus and the OWC Thunderbay series. The Promise is hardware raid, which means there is some piece of kit in the device that manages the RAID. It is a bit higher $/TB ratio, but, many people on these forums use them and swear by them (@SamE and @johnag , I believe). Typically they have improved rebuild times for new disks. I had a Pegasus r4i in my Mac Pro in RAID 5 and it never skipped a beat. I also have the Thunderbays using SoftRAID. The RAID is managed via software, which, means you can take all the disks out of the enclosure and move them into another one in case the enclosure dies, but, the rebuild performance is typically less than dedicated hardware raid controllers. I’ve got a couple of Thunderbay 6 and they’ve served me very well over the last 18 months. Each have 6x8TB disks and I can combine the 2 enclosures with SoftRAID and then create a RAID 10 across all the disks such that 40TB usable but lotsa protection from disk failures.
Another great option is the NAS route. @finnjaeger is a fan of this approach. At its bare minimum, you could get a couple of 2 slot Synology NAS, with 8TB disks in each one, RAID 1 the disks, and then setup Snapshots and Replications to effectively clone an entire Synology NAS to the other giving you a reasonably inexpensive but pretty darn powerful introduction to the Synology ecosystem. Then hide an online backup in Google Drive or Dropbox for a couple hundred a year or a cloud service like Wasabi for $6TB/mo and off you go. The challenge with NAS devices is that pretty quickly you’re gonna want to take advantage of 10GB networking and then all of a sudden the costs jump up a little bit. But, at the higher end of prosumer 12 bay NAS devices over 10GB you can get amazing performance for your buck. I’m transitioning to the NAS approach and whilst Synology gets poopooed by the purists who prefer ZFS or TrueNAS (@andy_dill , how you likin’ yours?), the fact that in this day in age you can find Synology products in every online marketplace and every YouTuber under the sun has a Synology NAS How To video about the very thing you’re trying to figure out, it’s a highly compelling solution. Just be careful if you go the NAS route, as you’re data is now possibly easily accessible to all the inter web knuckleheads so kill the admin accounts, change a couple default ports, turn off external access, turn on firewalls, and setup a VPN into it if you need to remotely access it. There are far too many bots auto scanning IPs looking for Synology admin port 5000 and default admin accounts to ransom ware your deets.
The best designed systems, which, isn’t anything you’ll need on day 1 to day 600, have local redundancy in case of a disk/enclosure/NAS failure, a local/possible offsite copy in case of malware/cryptolocker/malicious whatevs, and a traditional offsite/cloud backup in either cloud or Google Drive/equivalent. So if you’re going to get into the wide world of home data hoarding, you’ll need to budget for a least 2 local copies and an offsite. It’s a very humbling feeling to see a bunch of spinning disks spin up, vibrate the shite outta your desk, heat up your home office, and then you’ll realize holy cow if this thing dies I’m screwed.