Originally Posted by grandcentral
I upgraded my Galaxy 10.1 (2014 edition) which has 32 gigs. I found I had several apps installed on a micro sd card that worked with version 4.3 and still work with 4.4.2. Also I downloaded a couple of apps since then and I found I could move them to the micro sd card ant app seems to run as normal. Maybe before Samsung made 4.4.2 available they changed something to work from the card. If you have any apps in the main memory that you have downloaded see if they can be moved to sd card. Some can and some can't. Depends on the developer.
Try moving a file or creating a folder on the external SD card with a non-Samsung file manager. You can't. Even if you could, only the app that created the folder or file would have access to it. I used to sync files on my N3's external SD card with my home server using FolderSync and it worked flawlessly on 4.3. Once I updated to 4.4 FolderSync spits out error messages every time it tries to write a file to external storage. This has been an issue since KK first landed on a device with external storage (which was the Google Play Edition SGS4 in November). It is what it is and, without rooting to change access permissions, can't be changed and affects every device equally. Thankfully for those of us that can't or won't root, Samsung at least provided some of their key apps with universal read/write permissions.
Here's what the "My Documents" folder created by Hancom on my external SD actually translates to on my N3.
And external storage appears just like normal within any app that's created files or folders there.