[Samsung Galaxy Mega] Zeuszoos:
Awesome, because I am having a problem that I am hoping someone has seen before and knows how to solve without a Factory Reset!

Samsung Galaxy {SGH-M819N) Mega 6.3" [MetroPCS]

KitKat 4.4.4, Rooted, Philz Recovery 6.48.4, CWM 6.0.5.0

I updated to KitKat using the step-by-step method I posted in another Mega thread {link provided if youu want it} and rerooted it and everything was working fine for weeks.

But then, a couple of days ago, there was a Samsung Account Update and I went ahead and did it and when I rebooted, everything was back at default {meaning the Home Screens setup}. All my apps were there and everything, but not on my Home Screens and my folder app (3rd party) was installed, but all of the folders went bye bye.

After running some apps, what I found out, was that while all of the apps are installed, they were all reset back to a state like if you just installed them. No big deal, I have a NanDroid Backup, right?

After setting up a couple of apps just to make sure they would and clearing the Home Screens, I Restored from my TWRP (at that time) backup, but when I rebooted, all that happened was that it put me back to right after the hose up. The Home Screens looked like an "out of the box" phone setup again and the same two apps I set up went back to that "just installed" state, so for whatever reason, my NanDroid backup was useless!

My phone is still on KitKat 4.4.4, as well as my apps being there and just needing setup again, so why not just set up my apps and be done with it, right?

Well, that's where the problem comes in! For SOME of my apps, they will not write to, nor read from the phone's storage. Even its built-in storage! It doesn't mater if it's to/from the Internal, or External storage.

Please allow me to give you some examples:

Google Play Store works fine! No problem at all!

But Amazon App Store, while it comes up and runs, it cannot download any apps. It gives me an error about accessing.

The 1Mobile App Store does the same thing, stating that it cannot access its download folder. I even tries creating it, but it made no difference.

Sound Profile, which does profiles for how your phone acts (sounds, volumes, scheduling profiles, wallpapers, etc., etc.) cannt setup, because it says that it cannot access its own files that it creates on the Internal Storage, even when I restore them from a backup for that app.

Image Search apps, that also download the images, can search for and view the images, but no matter which app, when I tell it to download one, it says; "This app requires external storage". But the download folder is on my Internal Storage.

Titanium Backup Pro says that it cannot see its"backup folder", even after I created it.

One last example, "Xposed Installer" will install, but when I try to Activate the Framework, it turns the top thing green, but the bottom "Bridge" thing stays red and none of my mods will work when I reboot.

*** But there are other apps that work fine. For example, my news apps, which of course must download that days news, download and update the news fine. And my Call Blocker app works fine.

Also, I have (and it worked fine for weeks) run the KitKat SD Card patch, which is a great little tool, that allowed apps to write their data to the Extrnal SD Card, for those apps that allow you to choose that location. I even got my Call Blocker to bloack SMS/Texts in KitKat, using an Xposed Mod that yu only need run once (in case anybody wants to know how and what).

I have tried running JRummy's "Fix Permissions" app ad ran it on 4 different apps that were having this problem, but it didnt help.

And any apps I have that offer a Pro version, I did buy the upgrade, so I know that it's not limitations built into the app that only go away when you go Pro or anything like that.

I have tried uninstalling and reinstalling the apps, cleaning up afterward to make sure there were no traces of them left, but they still exhibited the same exact problem.

I feel like something is "blocked". Something is "blocking" certain apps, because of a certain thing that they all due, that they have in common, but I just can't figure out what it is.

I can copy and move data back and forth between my Internal and External storage in a File Manager with no problem. I can also delete folders and files.

Does anyone have any idea what's going on here? I have sent the last two days trying this and that and scouring the Internet and XDA regarding this issue, but the only thing I find, is related to Google Play not being able to download apps, or a specific (just one) app. But obviously, neither of these are my issue.

Can anyone please help me??? I just can't figure this out and I really, really want to avoid a Factory Reset! I did try wiping the Internal Storage using the Recovery Menu, which still left my apps intact (but is probably what set them all back to installed state in the 1st place), but that didn't fix this problem either.

Obviously I now don't have a NanDroid Backup, so if there's something else I could try, that would be awesome if it worked and I will certainly create a new thread for this phone with the fix with a link to it here (giving the poster full credit, of course). Or, once I post here that it worked, the poster can create the thread themselves. Just trying to ease their workload as a thanks. :)

Thank you all so much for taking the time to read this rather long post and I'm sorry for the length of it, but I know how important it is to give readers the details! :)