Sometimes the little things can cause a big headache
The Android 4.3 update for your shiny new Galaxy S4 Google Play edition phone has a minor issue that is frustrating more than a few users. Most apps can no longer write anything to the SD card, and instated just give you an error when you try doing it.
It's one of those little things that can cause a lot of headache. The technical reasons are a group ID issue, and applications aren't given permission to access the external storage for writing because they aren't in the right group. It's a Unix thing, and if you don't understand it all you're not alone — just know that it's an easy fix in a number of different ways, and hopefully it gets fixed soon. If you do understand, we'll cover it a little more later in this post.
While we're waiting for a permanent fix, the good news is that you can copy files to the external SD card by hand, as long as you use ES File Explorer to do so. Either through magic, or crafty developing, ES File Explorer is a member of the correct group to both read and write to the SD card. There may be other apps that can do the same, but we'll recommend this one because we've tested it ourselves and know it works. Grab it at from the Google Play download link above. If you're the type who likes to dig into things and break fix them yourself, or just a little nerdy and curious, head past the break.