If you’re shopping for a new phone, one thing that you need to think carefully about is how much phone memory you need. That’s because the phone memory is where all your photos, apps, music and everything else are stored.

Phone storage is measured in gigabytes (GB). It’s important to think about how many GB all your music, videos, photos and apps will take up before you buy a new phone because some phones won’t let you add more memory if you need it.

So what can you store in 1GB of memory?

How much memory do I need in my phone

A phone with a 16GB memory, like the Samsung Galaxy S5 or iPhone 6, should be able to store around 4,500 songs or 16 movies.

But it’s important to remember that not all of that 16GB memory is available for you to use. Some of that storage has already been taken up by the phone’s software. You can check how much memory is actually available in your phone by going to the storage section of your phone’s settings.

If you find that you don’t have enough memory, a lot of phones take a memory card that would give you the space to store your extra stuff.

MicroSD cards are the type of memory card that phones take. And new phones, like the Sony Xperia Z3 and HTC One M8, can take microSD cards that pack a massive 128GB of extra storage.

These memory cards are really handy if you get a phone that turns out not to have enough storage for you. But there are some downsides to using them.

If you’ve got lots of your apps on a MicroSD card, you’ll find that your phone runs more slowly. That’s because it takes more time to load an app from a memory card than it does from your phone’s internal memory.

And because your phone has to work harder to read things from a memory card, your battery life could suffer. So storing lots of stuff on a MicroSD card could mean you have to charge your phone more often, so it’s best to get a phone with enough internal storage for you.