Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.


macrumors regular
Original poster
Sep 12, 2014
If I add the 10 gigs of music I have, will it slow my iphone down? I'm worried it will be really sluggish... i got a 128GB 6


macrumors 604
Apr 6, 2007
No, adding anything to the storage on your phone will not slow it down in any way.

I've got 20.7GB of music, 16.7GB of Videos, and 4.8 GB of photos, 2 Gb of books, 1.9GB of Messages, among other things on my iPhone 6 Plus 128GB. It's as fast as it was when it was empty.

There's 128GB of storage on your phone. It's meant to be used. :) And 10GB will barely put a dent in that available space.


macrumors regular
Aug 4, 2014
If I add the 10 gigs of music I have, will it slow my iphone down? I'm worried it will be really sluggish... i got a 128GB 6

Even if it did (which is doesn't), 10GB of music in a 128GB iPhone wouldn't do anything at all anyway so you'll be fine. I have about 2GB of music on my 16GB 5s and it's as fast as it's ever been.

The OS can slow down older phones but a 128GB iPhone won't have any issues at all.


macrumors 68020
Apr 18, 2010
Yep it does. On my 5s I added about 3 albums and some apps wouldn't even run. Absolute joke, had to return the phone to no avail. Lesson learned - don't add music.


macrumors 6502a
Jun 14, 2013
Only if it's 10gigs of waltzes. :D

I dumped 50GB of movies and music onto my iPhone 6 as soon as I got home, and it's fine (128GB model). Maybe if it had a hard drive, but it doesn't.


macrumors member
Feb 28, 2013
I'm going to come at this from a slightly different angle

Not anymore.......

I mean this by not ever since they stopped using hard drives in devices, so not mobile phones then. Hard drives would slow down the read/write speed as you filled them up only due to you filling up the platter and the head having to travel further to read/write the data. Hence defragmentation back then and the tedious bordem it entailed.

That is not the case in SSD as far as I am aware.

However if you were to fill your phone to the absolute brim it might slow down ever so slightly as the OS may use some of the SSD space as a memory swap partition to keep things going when RAM is being pushed.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.