Questions tagged [file-system]

A file system is the logical structure to organize (store, retrieve and update) data on a storage device.

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Is FBE + Metadata Encryption secure if pin/password not set

My device is based on Android 11 and does not have a security lock screen. By default it has FBE and Metadata encryption enabled. How secure this encryption is without setting the Pin/password. How is ...
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How find large files with QDirStat on Android 11 with root?

I want to list all files in my phones /data volume using QDirStat, or something simular. On my phone, I've used DiskUsage (com.google.android.diskusage) before, but I find the visualization lacking. I ...
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Accessing Bug Reports and Termux storage in file explorer?

A lot of apps call Android's "Open file" dialog when they want the user to select any file on their phone - for example when attaching a file to an email, or when opening a file with an ...
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Having confusion building erofs format system.img for Android

I try to edit an Android 11 system.img file that was extracted from super.img. Now I have an issue that is very confusing to me. First, I extracted system.img by this command (The file system is erofs,...
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How to secure files in SD card by using adoptable storage?

I asked this question before, and this is a follow-up. I am trying to encrypt my SD card for data security (I don't want some random guy to be able to access my photos/documents/downloads by just ...
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What type of data is excluded from the "media only" file permission in Android 12?

Starting from Android 11, there are 2 levels of file access permission, i.e., "files, media, and everything" permission and "media only" permission. What is the difference between ...
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Is it possible to proot into an Android rootfs?

Where can i download an android rootfs? I was wondering will it be possible to use Android on Linux using (proot)
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How to use file picker from command line

I would like to launch a file picker from a script to graphically select file. While I am able to launch a file picker by sending intent am start -a android.intent.action.OPEN_DOCUMENT -d /storage/...
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Get file from our app on a customer's device

I work for a company that developed an Android app, but since then the guys that wrote it have left. I am a beginner when it comes to Android development. We have a situation where our customer has ...
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Local HTML file links cannot be followed

Background: I use my tablet for Geocaching, specifically to have cache listings available in the field. For this purpose, I have a program called Geocaching Swiss Army Knife (also known as GSAK) ...
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How to mount network drive so it's accessible by other apps file picker?

I have a handful of apps that have file pickers, but they only show me what is in /storage/emulated/0 (also shown on my phone as "Internal Storage") and below. I want to mount a NAS so that ...
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Micro SD cards work on phone with Android 8 but corrupted in phone with Android 11?

I have two SanDisk micro SD cards, a 8GB one for storing my photos and files in a Sony Xperia XA1, which runs Android 8.0 as the OS, the other one is a 128GB used in a Sony Xperia L3 phone, running ...
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Avoid re-downloading files with Termux in its own downloads folder

I have some files for which I don't have any app to open them with, but whenever I try to open them, instead of the "try looking in the Play Store for an app to open your file" dialog, I get ...
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Cannot Mount userdata partition on Android 11

I have pulled a block of encrypted userdata partition ".img" and trying to mount it on unecnrypted device (same device with encryption set to off). My device is rooted. My userdata is ...
2 votes
1 answer
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Exploring options for customizing SeLinux policy ( SePolicy to enable bind-mounting ) , including kernel recompilation

As I realized selinux for Android is more than tad bit different creature than what I can get done on Linux . I need SeLinux policy to be modified so I can bind mount my folders. Unless that happens ...
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WhatsApp backup shrinks in size for no apparent reason

AFAIK there were never msgstore.db.crypt14 incremental backups in WhatsApp message file backup design strategy - aka everyday WhatsApp leaves a 1.1gb file in /sdcard/WhatsApp/databases . Now I know ...
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MicroSD card works fine on Mac and digital camera but Android phone wants to format it

I have two identical 64 gig microSD cards I bought three weeks ago. They both work fine in my Canon IXUS camera and they both work fine in my year-old M1 MacBook Air. But only one works in my new ...
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Some music metadata/tags dissapeared after copying to micro sd

I tried copying my large music library from my internal storage to my external micro sd card, only to find 50% of my album art went missing, some artist and album info is gone, while the songs ...
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Why can't I access data folder from file manager anymore? [duplicate]

Just as stated in the title, and just a few days ago or so I got my phone updated. Mine is android 11. Previously, I still can access data folder on sdcard i.e. where the data files of apps are stored....
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Can I rename the external storage mount point on Android10 with root access

System: rooted Samsung Galaxy S10 with Android10 I have replaced my old external sdcard (128GB) with a new and bigger one (512GB). The old card was automaticly mounted to /storage/6639-3031. The new ...
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How can I write in a HDD on windows that I can read later on a Nokia Streaming Box 8000 (android TV)

I just bought a Nokia Android TV with a super nice USB A 3.0 port (that was the main reason to choose it) where I want to plug my external 2.5' 2TB hdd with all my movies and music and such. BUT, when ...
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Can installed apps access data on android storage in background

Will it be possible for an app to read data in the background if it has media access permissions or even full storage access permission? Assumptions: Android 11 and above Media and file storage ...
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Configure Chrome Shortcuts using the file system

The usual way of adding a Chrome Shortcut to the Homescreen would be to open Chrome, navigate to the Homepage and tip "add to Homescreen". Since I have a lot (and I mean a lot) of devices, i ...
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Is there a folder for local unix sockets under Android?

On a normal linux installation the right path for local sockets is /run as described in the FSH. But this folder does not exist under Android. I have checked both an old and a new device. There is the ...
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Weird files inside the root folder

I previewed (not downloaded) by mistake today a malicious pdf on Gmail app with Adobe Reader app, and I already inspected the phone for malware, uninstalled Adobe Reader app in case it was exploited, ...
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File attributes on Android (Linux): Any way to make a file fully writable but not deleteable?

I tried chattr with the +a (+i is even more restrictive), but it immediately caused app panic aka "app has stopped". What I want to do is make a file & folder undeletable. You can ...
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Why does the use of symlinks in /system gradually erode available space?

I am working on a routine for swapping dictionaries on an e-reader (Nook Simple Touch--Android 2.1). I've got the shell commands nailed down and have constructed an app using Tasker. It all works ...
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Access my application files of an old App

I have this old-ish Android app running on my Pixel4 w/Android12 phone, the app was last updated on 2018 and it clearly uses old API or whatever and the built-in backup functions are obsolete. It ...
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"The Magic", that Magisk isn't supposed to do

I have magisk 24 which I futilely tried to downgrade using XDA's guide but did not succeed, which is the 2nd part of my Question . There is something v interesting I note ( not sure how long its ...
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Are the Android app switcher/multitasking snapshots created when an app is sent to the background, encrypted?

This post here: https://android.stackexchange.com/a/218963/364009 outlines the snapshots location for the app switcher when an app is sent to the background, /data/system_ce/userid/snapshots, or at ...
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Access Android/data on parental-restricted phone

I'm looking for a way to backup a Minecraft PE worlds on a phone that has parental-control enabled (best in an automated way). The Minecraft on Android has the ability to save the worlds in the "...
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Where can I find exact times when my device has been turned off?

I'd like to know the exact times when my phone was turned off during last week (or more). I presume android has a kind of logs keeping this information somewhere. Can someone helps ? Thx
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Is it safe to delete a .bin file on an Android 11 phone?

I keep getting .bin files that show zero data in them and others that pop up regularly. Is it safe to delete them? Do they contain any vital information. Are they remnants of sites I've visited using ...
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1 vote
1 answer
106 views

Where is hidden additional data of an app stored?

This question came to my mind when I installed Oxford Dictionary. It's strange that I couldn't see the additional files (audio, dictionary, and pictures) in an unrooted device. This app has a base app ...
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What is the /data/misc folder?

I recently ditched my phone's stock ROM for a lightweight custom one. After transferring my files over, reinstalling apps and reconfiguring settings, I wanted to perform a full backup of the phone's &...
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How to delete google_app_measurement_local.db-shm that exists and can't be found at the same time?

I had to reinstall an application that was working. After uninstalling, upon trying to launch it, it crashed immediately without really showing any errors. In logcat I noticed many errors like this: ...
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contents of data partition in android

does anyone know what all content is stored in /data or userdata partition in android-10. I see a lot of directories in /data like app-staging, misc, system, vendor. what information is stored in ...
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What file systems can I use with my SD card on a Samsung A10S?

I'm using a Samsung A10S phone. I use Arch Linux, no Windows, and I want my phone's SD card to be highly compatible with my PC. The default SD format seems to be vFAT which disallows many special ...
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How to investigate what is hogging disk space

Even after cleaning all picture and documents, and most applications, on my tablet using standard Android tools, the internal storage is still reported as full. I now experience similar problems on my ...
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How to access hosts file?

I am following these instructions to modify the hosts file (map IPs to names) and it says it is under /system/etc. When I went into my Android file browser, I did not find that directory. Is it ...
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SD Card suddenly not recognized?

Xiaomis Redmi 8 stopped recognizing a 128gb SD card by SanDisk a few months after first usage. The card is not broken, neither is the phones slot. The card works fine in my Samsung M20 and other cards ...
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What is the path to Internal memory on android phone?

I'm trying to remove files from my Internal memory (which is 99% full). In Big Files app, I can find large files, but unclear whether they are on the SD card on Internal memory. E.g., I think this is ...
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What is GROWTH_TEST and appGrowthLog.txt inside of it?

I recently found the folder GROWTH_TEST on my Samsung phone, and it has the file appGrowthLog.txt in it that says "com.android.volley.NetworkErrorcom.android.volley.VolleyError: Network ...
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How to mount mmbclk0 for data recovery using testdisk and the like?

No standard Linux tool seems to be able to mount mmcblk0.img The partition table isn't something regular tools know of. Testdisk knows nothing of it either. For background, I formatted the device by ...
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Safe to delete files in /storage/emulated/media/logs?

My phone is running out of free space. When Settings > Storage displayedmore than 30GB used by "System", I looked into it further using the DiskUsage Android app. It told me that /...
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Where can an app store a drone video?

I have a Tomzon D65 drone, and the accompanying Tomzon-G app (Ver:1.1.2). The drone captured some awesome footage! It plays in the app fine. However, the app won't let me download the file. I suspect ...
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How can I find out where all my storage space is gone?

I've seen lots of posts here and elsewhere, including YouTube videos, about how to free up space on your android device or find out where it's all gone, including multiple redmi-specific ones, but ...
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Approaches to support exFat on AOSP Android 10+ where it isnt native

Just found out that my AOSP Android does not support exFat. Any thoughts about getting exFat support added. I read about this plugin that will work only for USB-OTG not for memory card - lest I ...
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How can I copy my MIUI settings-based backup to my PC?

I'm using a Mi 9 SE with MIUI Global 12.5.1. I've just performed a backup using MIUI's Settings backup mechanism (accessible via Settings > Additional Settings > Backup & Restore); and I see ...
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How to extract data from app?

So I want to switch pedometer apps but move over my data. I thought I could just get the database, extract the relevant entries and inject them into the other app's database. But no. First off adb ...
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