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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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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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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What is the location of recorded call files from Call Recorder?

I have Call Recorder installed and it is recording phone calls, which I can see in the application. I would like to see these files in filesystem too. Where are they? I see location Internal storage/...
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Does the Android SDK Emulator mount the filesystems on the host or emulate the mounting?

Does the Android Studio Emulator mount filesystems (like system.img and userdata-qemu.img) or emulate the mounting by making an illusion because I can't find them (the mounted filesystems) on the host ...
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Modifications of vendor image on Android 10 - alternative idea

Further to my earlier question here and according to the "Mounting Partitions Early" article, I'm looking the correct way to implement my new idea: Skipping the mounting in the startup of ...
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How can one list all large files?

One can list all directories on /mnt using: adb shell ls /mnt How can one list all files which are larger than 100M in the directory /mnt? adb shell find -size +10M ; sudo adb shell find -size +10M ...
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Which format the system images for avd are in

After downloading an image for android virtual device via avdmanager there are system.img userdata.img ramdisk.img and kernel_ranchu in system images folder. Which format are they in and how to read/...
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Android reports file sizes different than windows

Android and windows report different file sizes for the same files. why is that? Looking at two video files, on device both the Gallery and file manager report a certain size, but browsing to those ...
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How to expose a folder to a PC using mount command

I've been messing with termux on a rooted tablet (mediatek), and I'm trying to expose a folder using mount that will be accessible to my PC via a USB connection over mtp (with read/write permission). ...
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How to show configure mount ext2 ext4 formatted SD card partitions in android file manager?

How to show configure mount ext2 ext4 formatted SD card partitions in android file manager? As fat32 fiile system don't support files more than 4 gb I have to take backup before after rooting for ...
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How to mount image file without root?

In rooted android phone, ext4 image file is mounted using these commands in android terminal : # mknod /dev/block/loop52 b 7 0 # losetup /dev/block/loop52 /sdcard/ext1.img # mkdir /mnt/...
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Data Recovery on Android 11 with broken screen

I have a pixel 4a running android 11 with a broken screen. The full screen is black; the lower part of the touch screen seems to be responsive but I can't really tell what's going on so I don't know ...
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How to add strong encryption to an SD card so that I can access it both on my desktop and phone using open source non tracking offline tools?

The question says it all. So far I was able to find out Default android encrypted SD card can only be read by the phone or by a skilled hacker or their non open source tools There are tools that are ...
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change file system F2FS back to EXT4

Xiaomi Poco M3 (citrus) A-only (SAR) system-as-root device shipped with MIUI 12 Android 10 and F2FS (FBE encryption). I don't trust F2FS and want to run it plain EXT4 unencrypted. I formatted EXT4 and ...
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.nomedia + SD Card - just can't create the file, no matter what

I have an ASUS Zenfone 7 Pro phone running Android 11. This phone comes with an SD card slot and so I wanted to make use of it. It stored the files great, I can read the files all good. But I cannot ...
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Resuming multiple downloads in Chrome

Many sites give all their files the same name. When downloading multiple files like this, Chrome helpfully adds a (1), (2), etc. to the filename. However, if something interrupts the download, such as ...
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