Choosing a Synology That Fits You

What a NAS Is, and Why Synology

A NAS is a little always-on computer whose only job is to hold your files and share them with the phones, tablets, and computers in your home. Think of it as your own filing cabinet that everyone can open over the Wi-Fi.

You could use a plain USB drive, but that plugs into one computer at a time and has no safety net. A NAS is always on, reachable by the whole household, and can hold two or more drives so your files survive if one drive dies.

• The software, called DSM, is friendly - it looks like a simple desktop in your web browser.
• It is reliable and has been around a long time, so help is easy to find.
• Free apps handle photos, backups, and files without a monthly fee.
• You own your data - it lives in your home, not on a company's server.

How Many Drive Bays Do You Need?

A "bay" is a slot that holds one hard drive. The number of bays is the single biggest choice you make. More bays means more storage and more safety, but also more cost.

For nearly everyone reading this, a 2-bay model is the right answer. Two drives let the NAS keep a duplicate so that if one drive fails, your files are still safe and the box keeps running.

Reading Synology Model Names

The names look like a license plate - DS224+, DS423, DS923+. Once you know the pattern, they actually tell you a lot. Here is how to read them.

The plain models (no plus) are fine for basic file storage and backups. The Plus (+) models cost a bit more but run faster, hold more memory, and support snapshots. If your budget allows, the Plus line is the better long-term buy.

• DS means DiskStation - the desktop home models. (RS models are rack-mounted for businesses.)
• The first digits are the number of bays. "2" means 2 bays, "4" means 4 bays.
• The last two digits hint at the year it came out - "24" means the 2024 line.
• A plus sign (+) means the higher-end "Plus" series, with more power and the Btrfs file system.

How Much Storage Do You Really Need?

This is where people guess low and regret it. Storage is measured in terabytes (TB). One terabyte holds a lot - very roughly a couple hundred thousand phone photos - but families fill space faster than they expect.

Remember that in a 2-bay NAS using the safe layout, part of the space is used to protect your files, so your usable room is less than the two drives added together. Plan for that, and lean toward bigger drives than you think you need.

Choosing the Drives

A Synology usually comes with no drives inside - you buy those separately and slide them in. The kind of drive you pick matters, because a NAS runs its drives around the clock.

Look for drives built for a NAS - common lines include Western Digital Red Plus and Seagate IronWolf. They are made to run 24 hours a day for years. A plain desktop drive can work, but NAS-rated drives are designed for this job and last longer in it.

• Hard drives (HDD) - spinning disks, cheaper per terabyte, and the right choice for most home NAS storage.
• Solid-state drives (SSD) - faster and silent, but far pricier for the same space. Usually overkill for holding files.

RAID and SHR, Explained Simply

RAID is just a way of combining two or more drives so they protect each other. If that sounds technical, do not worry - Synology has an easier version called SHR that handles it for you.

With two drives set up the safe way, the NAS keeps enough of a duplicate that if one drive fails, none of your files are lost - you just slide in a new drive and it rebuilds itself.

Btrfs vs. ext4 - Why It Matters

When you set up a Synology, it asks which "file system" to use. This is the invisible way it organizes data on the drives. There are two choices, and one is clearly better for most people.

The big win is snapshots. A snapshot is like a saved point in time for your files. If you accidentally delete or change something - or if a nasty program scrambles your files - you can roll back to how things were. That safety net is why I recommend Btrfs whenever the model supports it.

• Btrfs - the modern choice. It supports snapshots and quietly checks your files for corruption.
• ext4 - older and simpler. It works fine but lacks those extra safety features.

Memory (RAM) and Room to Grow

RAM is the NAS's short-term working memory. More RAM lets it juggle more tasks at once - several people using it, apps running, backups happening - without slowing down.

Some larger models can connect an expansion unit - an extra box of bays - if you truly run out of room down the road. For most homes you will never need this, but it is nice to know the option exists on the bigger models.

• For basic file storage and backups, the memory that comes built in is plenty.
• If you plan to run lots of apps, host photos for a big family, or serve several users, more RAM helps.
• Many Plus models let you add more memory later - a small, cheap upgrade if you outgrow it.

Will It Run Plex? Does Transcoding Matter?

Plex is a popular app that turns your NAS into your own private Netflix - it streams your movies and shows to your TV, phone, or tablet. If that is a goal, one detail matters: transcoding.

Transcoding is when the NAS converts a video on the fly so it plays smoothly on whatever screen you are using. Some Synology models have special built-in help for this; others do not. If you plan to stream to devices around the house or away from home, this is worth checking.

• If you mostly play videos on the same network with capable devices, most models handle it fine.
• If you want to stream away from home to phones, look for a model known to transcode well.
• Model strengths change year to year - tell me your plan and I will point you to the right one.

How Many People Will Use It?

A NAS can serve just you, your whole family, or a small office. The number of people using it at once nudges you toward more bays, more memory, and a stronger model.

The good news is that even a modest Synology handles a normal family with ease. You only need to step up when many people are reading and writing large files at the same time, like a small office moving big documents all day.

Home Needs vs. Small-Business Needs

The same little box serves a family and a small shop, but the priorities differ. Knowing which side you are on helps you choose wisely.

• Photos and videos in one safe place the whole family can reach.
• Automatic backups of the household computers and phones.
• Maybe movie streaming with an app like Plex.

New vs. Refurbished or Used

A used or refurbished Synology can save money, and the box itself often has plenty of life left. But there is one real risk to understand before you buy.

The Synology unit is fairly rugged and can be a fine used buy from a reputable seller. The drives are the worry. A hard drive wears out with use, and a used drive may already be near the end of its life with no way for you to know.

Buying the Drives Separately

Most Synology models are sold "diskless" - the box comes empty and you buy the hard drives on their own. That surprises some folks, so budget for both.

Buy your two drives at the same time, same model and size. Some people even buy from slightly different batches to avoid two drives that might wear out on the same day - a small, sensible precaution.

• It lets you choose the exact size and type of drive you want.
• You can start with two drives and match them to your real needs.
• In a 2-bay unit, buy two identical drives so they pair up cleanly for safety.

Setting a Realistic Budget

Let's talk money in round numbers. Prices move around, so treat these as rough ballparks to plan with, not exact quotes.

That may sound like a lot next to a plain USB drive, but you are buying an always-on system that protects your files and serves the whole house for many years. Spread across its life, it is quite reasonable.

Accessories Worth the Money

You do not need a pile of add-ons, but a couple of extras genuinely protect your investment. Here are the ones I actually recommend.

A UPS is a small battery box your NAS plugs into. When the power flickers or goes out, it keeps the NAS running long enough to shut down safely. Sudden power loss is hard on a NAS, so this cheap box is real insurance. Synology can even talk to the UPS and shut itself down automatically.

Buying Something That Lasts

You want this box to still fit you in five years. You cannot predict everything, but a few smart choices now keep your options open later.

The single biggest regret people have is buying drives that were too small. Give yourself breathing room now and this box will serve you happily for years.

• Buy drives with headroom - fill maybe half of what you expect to need, so you have room to grow.
• Choose a Plus model if you can - more power today means it stays useful longer.
• Pick SHR for the drive layout - it makes upgrading to bigger drives simpler down the road.
• Leave a bay empty on a 4-bay model, so you can add a drive later without starting over.

Where to Buy Safely

A Synology is an investment, so buy it somewhere you can trust for a real warranty and honest returns. A too-good-to-be-true price is often exactly that.

• Well-known electronics retailers, in store or on their own website.
• Major online stores - but check that the seller is the store itself, not a random third party.
• Reputable computer shops that will stand behind what they sell.

A Simple "Which Model for You" Guide

Model names change every year, so instead of naming exact boxes, here is the type of Synology that fits each kind of person. Match yourself to a row and you are most of the way there.

What's in the 27-page PDF

• What a NAS really is and why folks pick Synology
• How many drive bays you need - and what the drives are
• Reading the model names without a headache
• How much storage you really need, and RAID in plain words
• New vs used, buying safely, and setting a real budget
• A simple "which model for you" table at the end

Why I wrote this

I write these as printable handouts because a guide you can keep in a drawer beats a web page you have to find again. No jargon, no judgment, no rushing. If you'd rather have someone sit beside you and go through it together, that's a flat $99 first visit with the 30-day follow-up included — serving Portage County from Atwater, Ohio. — Bill