For years, my storage strategy was simple: when I needed more space, I bought another drive. It worked well enough. External drives are cheap, fast enough for most things and almost impossible to misunderstand: plug one in, create a few folders, move some files and the problem disappears. At least for a while.
Eventually, though, my problem stopped being just a lack of capacity. I still needed more space, but buying another external drive would only have given me another place to lose track of things. That was when a NAS started making sense.
The files I keep are no longer just random downloads that can be replaced later. There are photos and videos from trips, edited material, project files and an increasingly large collection of STL files for miniature and scale-modelling projects. Some of those files are replaceable and some are not. A downloaded STL can usually be downloaded again; a photo taken years ago cannot. An edited project can sometimes be recreated, but doing that may mean repeating hours of work.
Once enough important files accumulate, storage becomes less about finding free gigabytes and more about knowing where everything is and what happens if something fails. External drives are very good at storing files. They are less good at becoming a system.
Too many places
The first problem is fragmentation. One drive fills up, so another appears. Then a larger one replaces part of the setup. Some files stay on the main PC because I use them often, older material gets moved somewhere else, a laptop ends up with a few copies and a phone has another batch waiting to be transferred. Nothing is necessarily broken, but the organisation starts depending on memory.
I do not want to remember which drive has the older trip photos, which one contains video, whether a particular project is already archived or still sitting on the desktop because I never finished moving it. I wanted one obvious place where long-term data lives, and that is the main thing a NAS gives me.
Instead of attaching storage to one computer, I attach it to the network. My PC can access it, but it does not own it. A laptop can use the same folders, a phone can reach selected files and other users can have their own accounts and permissions. I can keep a predictable structure for things like trips, creative work and STL collections without caring which physical disk contains a particular directory.
The NAS also does not need my main PC to be running. If I want a photo from another device, I do not need to turn on the desktop, find the right external drive and connect it first. The data is already there. That sounds like a small convenience, but small inconveniences are exactly the kind of thing that make systems fall apart over time. If moving or backing up files always needs a little bit of manual effort, eventually I will postpone it.
Failure and backup
The second reason was drive failure. An external drive is still one device containing one copy of whatever is stored on it. With a two-bay NAS I can mirror the drives, so if one of them fails the other still contains the data. That is useful, but it is not a backup.
If I delete a file, that deletion is mirrored too. If accessible files are encrypted by malware, redundancy does not undo it, and if the whole NAS is stolen or damaged, both disks can disappear together. Mirroring protects me from a failed disk; backup protects me from losing data. Those are different jobs.
What I like about the NAS setup is that it makes the second job easier to organise as well. Instead of trying to back up several computers and random external drives independently, I can first consolidate the important data and then back up that central location. An external drive can still be part of the setup, but now it has a clear role: it is a backup target rather than just another place where some files happen to live.
Room to grow
There is also a more boring reason for all of this: I know I am going to need more space. Photos accumulate, video grows even faster and higher resolutions make newer projects larger than older ones. STL libraries expand almost unnoticed because individual files are relatively small until there are thousands of them.
Buying another external disk whenever capacity gets tight works, but it keeps extending the same problem: another drive, another cable and another place where something might be. I would rather grow one organised system. A small two-bay NAS is enough for me now, and if I eventually outgrow it I can move to something larger without reinventing how everything is organised. The hardware can change without the structure changing with it.
Cloud storage could solve part of this too, and I still think it is useful, especially for off-site backup or files I need away from home. I just do not want several terabytes of personal data to live primarily on someone else's service. For files I mostly use at home, local network storage makes more sense to me: the disks are mine, the data is local and I decide how the system is organised.
I do not want storage to become another hobby
None of this is revolutionary. I could keep buying larger external drives, manually copy folders between devices and maintain several backup disks. With enough discipline, all of that would work. I simply do not want file management to become a hobby of its own. I already have hobbies.
I want to take photos, edit video, work on projects and build a useful collection of models, references and files. The storage should support those things, not create another layer of chores around them.
Another external drive would solve my next shortage of space. A NAS solves the way I want to store things in the first place.