Running Plex on a Synology - Your Own Movie & Music Library

What Plex Actually Is

Plex is your own private streaming library for media you already own. Think of it as your personal Netflix, except every title on it is something you put there - a movie you ripped from your own disc, a music album you bought, or the family videos from your camera.

It comes in two halves. The first is Plex Media Server, a program that runs on your Synology NAS. It quietly watches your folders, organizes everything into neat shelves, and finds the cover art and descriptions. The second half is the Plex app, which you install on your TV or phone to actually watch. The app talks to the server over your home network.

• One tidy place for all your movies, shows, and music.
• Beautiful cover art and summaries, added automatically.
• Press play on any TV or phone in the house.
• No monthly fee for the basics, and nothing ever disappears.

Plex vs Synology's Own Media Apps

Synology includes its own media tools, and they are perfectly good. It helps to know the difference so you pick the right one, or happily run both.

For a big movie and TV collection that you want on the living-room television, Plex is usually the friendlier choice because of its polished apps. For everyday photos, Synology Photos is already there and works well. Many folks use Plex for movies and let Synology handle the photos - there is no rule against running both.

Installing Plex Media Server

There are two friendly ways to install Plex on your Synology. Both are fine. Pick whichever you are comfortable with.

The version on the Plex website is sometimes newer than the one in Package Center. If you want the very latest, Option B gives it to you. If you prefer the simplest path, Option A is perfectly fine.

• Open Package Center in DSM (the app store built into your NAS).
• Search for Plex Media Server.
• Click Install, then wait for it to finish and open.

Making a Free Plex Account

Plex needs a free account to tie everything together. This is what lets your phone find your server and remembers where you left off in a movie.

The basic account is free and covers everything you need to watch at home. There is an optional paid upgrade called Plex Pass, which we cover later, but you do not need it to get started.

• Go to plex.tv in a web browser on your computer or phone.
• Choose Sign Up and enter your email address.
• Create a strong password you have not used elsewhere.
• You can also sign up with a Google or Apple account if you prefer.
• Check your email for a confirmation message and click to confirm.

Claiming and Linking Your Server

Claiming your server simply means telling Plex, this NAS is mine, and connecting it to your account. You do this once, right after installing.

Once claimed, your server shows up automatically whenever you sign in to a Plex app anywhere. You will not have to remember any numbers or addresses again.

• In a web browser on the same home network, go to the Plex web app.
• A common address is your NAS's local address followed by :32400/web - but the Plex setup usually opens it for you.
• Sign in with the free account you just made.
• When it offers, give your server a friendly name like Home Media.
• Follow the welcome screens - this links the server to your account.

Organizing Your Media Folders

Plex is tidiest when your files live in clear, separate folders. Before you add anything to Plex, set up a simple folder structure on the NAS.

Inside TV Shows, give each series its own folder, and inside that, a folder for each season. So a show might live in TV Shows, then the show's name, then Season 1. This is the layout Plex understands best, and it keeps episodes from getting jumbled together.

• Movies - one folder that holds all your films.
• TV Shows - one folder, with a sub-folder inside for each series.
• Music - one folder, organized by artist and then album.

Naming Files So Plex Finds the Artwork

Plex identifies each item mostly by its file name. Good names get the right cover art and description. Sloppy names get the wrong movie, or none at all.

Name a movie file with its title and the year, like The Sound of Music (1965). The year helps Plex tell apart films that share a title. Put each movie in its own folder named the same way if you can.

Adding Your Libraries

A library in Plex is simply a shelf pointed at one of your folders. You will make a Movies library, a TV Shows library, and a Music library.

After you add a library, Plex scans the folder and starts pulling in cover art and details. A large collection can take a while the first time - let it run in the background and check back later. It only has to do the big scan once.

• In the Plex web app, look for a plus sign or Add Library.
• Choose the type - Movies, TV Shows, or Music.
• Give the library a name.
• Browse to the matching folder on your NAS and select it.
• Finish, and let Plex scan the folder.

The Plex Apps - Where You Watch

The server holds your media. The apps are how you watch it. There is a Plex app for nearly every screen in a modern home, and they all sign in with your same free account.

To set one up, install the Plex app from that device's app store, open it, and sign in with your free account. Your Home Media server appears on its own, and your shelves are right there waiting.

• Smart TVs - many Samsung, LG, and other TVs have a Plex app in their app store.
• Streaming boxes and sticks - Roku, Amazon Fire TV, Apple TV, and Google TV all have Plex.
• Phones and tablets - free Plex apps for iPhone, iPad, and Android.
• Web browser - you can also watch right in a browser on a computer.

Transcoding - Why Your NAS Model Matters

Transcoding is the one word worth understanding. It means the server converting a video on the fly so a particular device or connection can play it. This is the job that asks the most from your NAS.

Imagine a movie stored in a high-quality format, but you are watching on a phone over a slower connection. The server shrinks and reshapes the video as it sends it, so it plays smoothly. That reshaping is transcoding, and it uses the NAS's processor hard while it happens.

Direct Play - When No Transcoding Is Needed

Here is the good news that balances the last chapter. When a device can already handle a file just as it is, the server sends it straight across with no conversion. This is called direct play, and it is easy on your NAS.

With direct play, the NAS is really just handing over the file, which almost any Synology can do without breaking a sweat. There is no reshaping, so the processor barely notices. This is the smoothest, lightest way to watch.

• Watch on a capable device like an Apple TV, Roku, Fire TV, or a smart TV, which handle most common formats.
• Watch over your home network rather than a slow outside connection.
• Keep your files in common formats that most devices already understand.

Watching Away From Home

One of the best parts of Plex is reaching your own library from anywhere - a hotel, a relative's house, or a long trip. Plex calls this remote access. As of 2025, watching your own videos away from home needs a paid Plex Pass, or the cheaper Remote Watch Pass - the free account no longer covers remote playback. On your own home network, everything stays free.

Away from home, your connection is usually slower than your home network, so the server may need to transcode down to a smaller size. That brings us back to why a capable NAS helps - it makes remote watching smoother.

• Sign in to the Plex web app on your home network.
• Open Settings, then Remote Access.
• Turn Remote Access on and let it test the connection.
• When it shows a green, connected result, you are set.
• Now sign in to the Plex app on your phone anywhere, and your library is there.

Plex Pass - The Optional Paid Extra

Almost everything so far works on the free account. Plex Pass is an optional paid subscription that adds extra features - and, since 2025, it is also what turns on watching your own videos away from home. You do not need it to enjoy Plex at home, but some folks find it worthwhile.

It is sold as a monthly or yearly plan, or a one-time lifetime purchase. Start free, live with Plex for a while, and only upgrade if you find yourself wanting one of these features. There is no rush.

• Watching your own videos away from home - since 2025 this needs Plex Pass, or the cheaper Remote Watch Pass.
• Hardware transcoding on supported NAS models, which we cover shortly.
• Downloading titles to a phone or tablet to watch offline.
• Some extra features for photos, music, and skipping intros.

Sharing Your Library With Family

Plex lets you share your library with family and close friends so they can watch your collection on their own devices, with their own account. You stay in control the whole time.

Each person gets their own progress and recommendations, so your movie does not resume on their screen. You can remove anyone's access at any time from that same screen.

• In the Plex web app, open Settings and find Users and Sharing, or Friends.
• Choose to add a user and enter their email address.
• Pick which libraries they may see - you can share some and not others.
• They accept the invite and sign in with their own free Plex account.

Subtitles

Subtitles put the spoken words on screen as text. They are wonderful for quiet late-night watching, for hard-to-hear dialogue, or simply if you prefer to read along. Plex handles them in a couple of ways.

While a movie plays, look for a speech-bubble or subtitle icon in the player controls. Tap it to turn subtitles on, off, or switch languages. If a movie has none available, Plex can often search and add them for you.

• Built into the file - many movie files already carry subtitle tracks you can switch on.
• Downloaded by Plex - Plex can fetch matching subtitles for many titles.
• Separate subtitle files - a small text file kept beside the movie with the same name.

Keeping Plex Updated

Plex releases updates regularly to fix problems, add features, and keep things secure. Keeping your server current is a small habit that pays off.

The apps on your TV and phone update themselves through their own app stores, so you rarely have to think about those. It is mainly the server on the NAS that you keep an eye on.

• If you installed from Package Center, updates can come through DSM's package updates.
• If you installed from the Plex website, download the newer file and install it over the top - your libraries stay put.
• The Plex web app usually shows a notice when a new server version is ready.

Hardware Transcoding - Only Some Models

This chapter is a bit more advanced, so feel free to skim it. It explains a feature that helps busy households, but only on certain NAS models.

Ordinary transcoding leans on the NAS's main processor, which can be slow going on a small model. Hardware transcoding uses a special built-in video chip - found on some Synology models with an Intel processor - to do that reshaping far more efficiently. It is like having a dedicated helper just for video.

• A NAS model whose processor includes the right video chip - not every model has it.
• A Plex Pass subscription, which unlocks the hardware transcoding feature.

A Simple Media Setup That Works

Let us bring it all together into one calm, dependable setup. This is what I would put in a typical home that wants a reliable Plex library.

Start free, keep your files tidy, and add media you own a little at a time. If you outgrow the free version or want smoother remote watching, you can always look at Plex Pass and a stronger NAS later.

• A Synology NAS sized to how your family watches - stronger if several people watch at once.
• Three shared folders on the NAS: Movies, TV Shows, and Music, neatly named inside.
• Plex Media Server installed and claimed to your free account.
• A capable TV or a Roku, Fire TV, or Apple TV in the main room for easy direct play.
• The free Plex app on the family's phones for watching around the house.

What's in the 27-page PDF

• What Plex is, and how it differs from Synology's own media apps
• Installing Plex Media Server and making a free account
• Organizing and naming your files so the artwork shows up
• Watching on your TV, phone, and streaming boxes
• What transcoding is, and why your NAS model matters
• Watching away from home, subtitles, and keeping Plex updated

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