Possible to export storage stats per application? - Android Q&A, Help & Troubleshooting

Samsung Xcover3, Marshmallow, unrooted, noob.
Is there a way to export (as CSV for example) storage, and possibly data transfer, stats per application?
I'm using an oldish phone with limited storage as a bike GPS, and mainly just go online through wifi to get maps and the occasional app I might want to add. I'm using NoRoot firewall to limit what can get through, but I find that G**gle etc manage to squeeze a lot of stuff down which I don't necessarily want. So for now I'd like to be able to export lists of installed apps with their storage, before and after wifi connection, to see if I can understand what's coming down, and what I can block or delete later.
Is there such an app? Or can I interrogate Android for that info from a connected Linux machine?
In the longer term I'll think about taking control of the device with a new OS, but for now I'd like to try the above.

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[Q] Possible to restrict apps from accessing InternalStorage / SDcard?

Is it possible in cm10 Nightlies or in general for that matter to somehow restrict specific apps from accessing the contents of the sdcard / internal storage (yes even reading)?
Or as another approach have them restricted to only their own folder on SD / internal storage?
Especially the Facebook app, I dont want it to have access to my pictures, dumped contactlists and other stuff I might be storing on sd.
To me the facebook app is just for mitigation of bad network connection otherwise I would use the mobile site instead.
I already use Pdroid 2.0 and droidwall. That gives quite an amount of control. But SDcard is still open to everything.
Is there such a thing? What would be the effort to make such a thing?

[Q] Android Security Questions

I am a hardware engineer with some limited software knowledge. I am ULTRA paranoid when it comes to security and have a few questions:
1) People do seem to be paying attention to app permissions now. If an app only had network and storage access permissions, people would probably think it seemed pretty tame. Am I wrong in thinking this is probably the most dangerous an app could be? With these permissions it seems that the app could siphon EVERYTHING off your phone to their servers.
I guess my question would be, do Apps that have read/write storage access, have at the very least read access to all files? For example, it seems that my music app can scan for music, which is fine obviously, but what is stopping it from scanning ANYTHING else on my phone? Like business related documents, private notes, etc...then uploading these to their servers.
2) If an app only has network access, but no access to storage, I assume it would have no ability to add anything malicious locally after installation (or transmit anything off your phone)? Basically, can an app load malicious code from the network?
3) One nice feature on the iPhone is that a full reset actually does a decent job protecting your data. On Android this is not the case. Does Android device encryption actually encrypt everything (i.e. starting from the root (/) directory)? If this is the case, I would assume that a full device encryption, followed by a factory reset would nearly be akin to running a dd urandom on the drive.
4) Google seems to be stepping in the right direction with the new App Ops in Android 4.3. I am not sure what direction they will be taking this, but currently on my Nexus 7 it does not allow you to prevent access to storage or the network (for example I would like to block Final Fantasy from having network access and Weather Bug from having storage access).
Regardless, can an app automatically run on installation? The reason I ask is let's say you are downloading a seemingly benign app, but it really wants to make a dump of personal data and send it to their servers. If I download the app, could it start doing this immediately, or would I need to manually launch it first? If this was the case, then App Ops would not be very useful against certain malicious apps if they have the 1-2 minutes to dump off your contacts list before you could shut them off in the menu.
during installation it'll ask for granting permissions before installed
once installed, it can do the things you granted without further request for permission
with popular apps like viber, this is supposed to be okay

more space and faster without root?

The desire x is my business mobile, so i dont want to mess with it in case any problems and i get charged for the phone. to be honest i struggle, its terrible device compared to my personal phone.
I need maps to navigate around, the connection in London drops when im close to destination, i blame this on the tall buildings blocking signal but not sure if 100% the reason. i was told may help to download a map program and use this way, but there is no storage free, and i have only 2 small apps required for work.
Is there a way to delete apps like chrome and facebook / twitter which came pre-installed but i cant remove them.
I tried adding a sd card but it wont allow me to move apsp to sd card. ( so failing the deletion of apps, can i roll back the rom to a older version?
pretty weird that the data partition is full, when there are only 2 apps installed.
are you storing all your company-mail on your phone or something like that??
whatever, as first step you can try to locate the storage-hog by using a storage analyser like https://play.google.com/store/apps/details?id=com.mobile_infographics_tools.mydrive&hl=de
i have downlaoded the program but not sure what i am lookign for?
can i remove the android APK files? surely once program isntalled i no longer need these?
A takes 591mb
O takes 127mb
App storage is taking 2.51Gb of 2.91 available.
Apps = 704Mb
other = 1.82Mb
Available - 408Mb but when i download the map program it requires me to download a large file for offline maps. plus i have this space as i deleted a few photos which were for work but old. so when i take photos this space decreases further.
the only apps i can uninstall are the two apps (about 40Mb each for work, plus i have pocket locker and now this analyser which have small footprints).

How do I freeze data usage stats?

I am looking to stop my phone from tracking the amount of data I use. I am rooted on 4.4.2. I found this thread (http://forum.xda-developers.com/showthread.php?t=2494991) from a while back, but when I open /data from Root with amaze the folder is empty. That solution really only suggests deleting the tracking file where I moreso want to just stop it from logging new information.
The goal here is to prevent individual apps from tracking how much data I use as they disable certain features after a set amount. I am pretty sure they just check the log rather than actually track the usage themselves as they seem to count ALL data, not just what's used by the specific app.

5 Best Ways To Reduce Mobile Data Consumption

5. Update your Apps Over WiFi Only
Many apps in Google play store get unnecessary updates by unnecessary i mean they are meant to fix bugs only, and have you noticed how many times all your apps were auto-updated without your consent, spending all them precious GBs, so wasting your finite date over useless updates is not a great idea. To disable Auto-Update you just need to open the Google Play Store and tap on the side tray button, click on Settings option and then select the “Auto-update apps” and select Auto-update apps over WiFi only.
4. Turn On Data Compression on Google Chrome
Most of us are Android users, coz this process is only for Android Users. And if you are an Android user you are also likely Chrome users. Most of us Don’t know that Chrome supports a feature that can reduce data consumption, Google states this feature should save you about 50% in data, without even feeling any difference. All you need to do is open Chrome and hit the menu button and select Settings, click Data Saver and then toggle the option and it done.
3. Cache Everything You Can
Like Google Maps and Google Play Music allow for storing data locally and many other apps. Make sure to save as many as caches and data you can while you are on a WiFi network. Afterwards you can enjoy your saved data without wasted Precious Mobile Data.
2. Avoid Online Streaming
The most awesome Things over the internet consume more data, this includes streaming videos and music, as well as looking through high quality images or GIF files. Try to avoid this kind of consumption as much as possible if you really want to save your mobile data. And if you need to watch it, make sure you change the settings and set quality at lower rates.
1. Restrict Background Data
Do you know that when your phone is not in use some apps spend your too much data. the feature we about to tell is actually one of the greatest features on Android. Background data allows apps to keep everything updated which leads to a great amount of Data wastage. so here is what you can do, Go into Settings > Data Usage and select Restrict Data for the apps that consume large amount of data and dont worry you can undo this by the same method.

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