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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60 views

TWRP unable to wipe or format `Failed to mount '/system' (Device or resource busy)`

I'm trying to install LineageOS and then GAPPS on my Pixel XL from TWRP recovery. I'll try to Advance Wipe the /systems directory and Format Data, but I continue to get multiple errors: Failed to ...
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1answer
39 views

How to identify the app/process which re-mounts partitions R/W, creates files and changes file permissions?

I have a rooted device, with superuser rights granted to a few apps I trust. I have often found my /system or /vendor partition mounted read/write, and some files chmoded to 0777. Similarly ...
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1answer
74 views

How can I know if fstrim was run when I put my phone on charging over night?

Is there any logging where I can confirm this?
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1answer
38 views

Why deleting system files on a rooted Android says “device or resource is busy”?

I have FX Explorer, I was trying to delete some stuff in /system/app (the stuff are just empty folders) but it keep saying The operation isn't permitted on a mounted filesystem. What should I do to ...
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13 views

Save doc to same location it was opened

I am looking for an Android word processor that does one thing ( aside from the usual editing and formatting). When I go to save a document, I want that document saved exactly in the same spot that I ...
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2answers
46 views

Getting signature error while installing a different version of the app

Recently I install a custom ROM named eelo https://e.foundation/. It comes with pre-installed Telegram app. After much research I was able to uninstall if from the system with the command adb shell pm ...
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1answer
46 views

If I reset my phone, will it also TRIM the fragmented eMMC?

I know that Android supports fstrim but it only works if the phone is idle for a long time while charging. I think my phone is too fragmented and is lacking performance so I want to reset it but I am ...
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49 views

An app on the play store promises to TRIM without root access but I highly doubt if it even works [duplicate]

My phone is new so I can't root it because I don't wanna void my warranty just yet and trimming my phone would also not make a significant difference. Since most other apps on the Play Store promise ...
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3answers
58 views

This app promises to run “fstrim” without root but I am not sure if it works

I am not sure if this app works. Can someone please help me? My phone is new and in its warranty period so I can't root it yet. I tried this app but I am not sure if it actually did something. Unlike ...
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1answer
82 views

How can I enable last_kmsg?

I'm trying to diagnose a random reboot on LineageOS 14. last_kmsg is not in /proc, nor it is in /sys/fs/pstore/console-ramoops. EDIT: ~# mount | grep PSTORE ~# mkdir /mnt/pstore && mount ...
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28 views

Can I get the account details or logged details of an application from the data / file system directory of phone?

Can i get the account details or logged details of an application from the data file of the application in the file system. My device is rooted. For example I have two Instagram accounts saved in the ...
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26 views

How to delete app remnants without root privileges?

I installed Chrooma Keyboard on an Android Nougat device. It worked fine, including swiping to enter text. After adjusting Chrooma's settings several times, it started to have a problem where ...
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22 views

Corrupt filesystem - only able to boot from external SD card

So I have a Samsung Galaxy J5 SM-J500F which suddenly refused to boot in any way (normal, recovery, download). I booted TWRP from external SD card but it shows Internal Storage (0 MB). Can't mount or ...
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0answers
16 views

How do I find and delete lost encrypted files?

I used the Asus File Manager app hidden cabinet feature to store files. Now the app crashes whenever I open it. The files being gone is a conclusion I've come to accept, but I would like to delete the ...
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35 views

Track files created/read by a certain app

I want to monitor a system app, say "S1." In particular, I want to know what files S1 is accessing/reading. S1 can also download files over the Internet and save them in the root of the system. I ...
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0answers
31 views

MicroSD card file system keeps getting corrupt for no obvious reason

Since when I got my current phone (May 2018) I had to reformat my MicroSD card about 3-4 times, probably because of file system corruption. (It's a SanDisk 8GB one, for those who are wondering. And ...
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12 views

Check internal/USB/OTG/Sdcard filesystem on Android [duplicate]

Is there any standard way or app to check which filesystem my device has, incl. external ones? Non-standard apps are also appreciated.
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131 views

Is there a way to change the default file manager app?

I was wondering whether I could replace the file manager that comes with my phone with a 3rd-party app in a way that any app that needs file access, goes through the 3rd-party app to find the ...
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1answer
55 views

Change file (pictures, videos) timestamp from filename

When moving files around tru different dirs and across PC / smartphone, timestamp for last modified date usually get reset to the very datetime of move / copy operation. This lead to files being non-...
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43 views

How Can I Check the Location of a File (e.g. Cluster or Sector #) in the Internal Storage?

I would like to know If I certain file moves on the Flash memory (internal storage), between writes/updates to it. Is there some way I can get the file's location on the Flash memory? (Cluster Number,...
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0answers
34 views

datadata is full - and doesn't let me remove files

A really old Smartphone having Cyanogenmod on it provides only about 400 MB space for data/data. Now this space is full. df shows 0.0K of free space. The homescreen doesn't even appear, only errors ...
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67 views

adb shell push image to recent or downloads folders not on sdcard

I want to push images to one of this folders: with shell command. But file only appears on sdcard folder My last tries was: adb push C:\Users\User\Pictures\girl.jpg /data/media/0/Pictures/ adb push ...
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1answer
152 views

What is the “u#_everybody” UID?

In (multi-user) Android there are UIDs like these: u0_everybody u10_everybody u11_everybody Those seem different to the usual uXX_aYY UIDs used for the applications. What is their purpose? Is this a ...
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0answers
33 views

Photos are grey/corrupted?

Whenever I take pictures with my phone, the picture turns grey, with only a strip of the picture on the side. I recently reset my phone to try to solve the problem, and it worked, but then it started ...
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0answers
143 views

Is it possible to open a locked android device or access it's files without knowing the password?

I have a Samsung phone which is password protected it also has fingerprint enabled. I don't need to know how to open it I just want to know if it's possible to unlock it or access its files? There ...
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49 views

Which apps can find Non-root apps's data? [duplicate]

Where Android apps store data? I am trying to find all the app data of a game installed on my device(2.53GB) for move it to another device(first time) because I need to change my device soon... I don'...
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1answer
69 views

How to create a copy of a file immediately when it's created? [duplicate]

I have an Android app that will create a file in /data/ and immediately delete it. I want to know how can I catch this file or create a copy or even disable user permissions to delete a file? I have ...
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41 views

Phone stuck in bootloop after renaming system APK

I have an xiaomi redmi note 5 rooted: to get rid of the notification system about new updates I've renamed the " Updater.apk " file on root /system/data/Updater , but now the phone in in bootloop. I'...
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1answer
19 views

File recovery on bootloader unlocked Pixel without flashing

I have a first generation Google Pixel the bootloader of which is unlocked and is running stock Pie. I need to recover deleted files on it because a move operation got effed up by ES File Explorer ...
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0answers
17 views

Is it possible to create shortcut in Android file system without root?

Android system doesn't provide ways to create shortcut in file system. I have tried using termux to create shortcut in my file system, but I don't have the authority. Is there a way to create ...
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1answer
391 views

Why is the '/storage/emulated/' directory inaccessible?

The /storage directory and the /storage/emulated/0 directory is accessible in a non-rooted Android OS. So, why is the /storage/emulated directory not accessible in a non-rooted Android OS ?
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2answers
926 views

Is it possible to change file permissions on Android's internal storage?

How can I change file permission of a file on Android without rooting? I actually want to prevent some files from deletion. Note: I am asking of changing the file permissions of user-created files in ...
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1answer
144 views

Why files/directories under Android's root filesystem don't change across different version updates?

I compared 2 devices; one running Android v5.1.1 and other v9.0. So I noticed that files under /proc are same in both. Can anyone explain why there is no difference even though OEM's are different and ...
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0answers
21 views

Audio files disappeared from S8!

Don't know how long ago the files disappeared or whether it has to do my the Oreo upgrade recently; or using the phone's "fix now" button to delete leftover files; but the audio files that were less ...
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1answer
269 views

How to change the modified date of a file without root?

How do I change the modified date of a file, specifically PNGs, on Android without root? Total Commander failed to do it with a permission error Access Denied.
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33 views

cannot write to exFAT directory ( WhatsApp image directory)

so I am running a galaxy j7 on Android 7 nougat something very strange happened recently just to give you a background to not max out my internal storage I have mounted WhatsApp folder using a third ...
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0answers
21 views

Only few files are visible from 5TB exFat external hdd on Galaxy S8+

I have a 5TB external storage with many RAW photos and videos. They are sorted by dates in folders and the hdd itself is almost full. When I connect it to my PC, it recognizes all files and ...
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0answers
31 views

How to transfer system app (built-in app) from android to android?

I have Collins dictionary in my Samsung Galaxy S6 edge which is System app (it can only be disabled, no uninstall option). I want to transfer this dictionary to my j7 mobile but it does not transfers ...
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0answers
70 views

How can I restore deleted pictures from Android (LG G5, Android 7.0)?

I was looking at my phone pictures from my PC and I accidentally deleted them. I've looked on my PC trash but they are not there and I can't find them in my phone either. Is there any way I could ...
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3answers
419 views

How to access files via localhost in firefox browser

I'm looking for a way to access my devices files in Firefox. The reason for this is I want to use an extension to read *.md file. I know that I can use file:/// to access files, but the extension can'...
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1answer
101 views

Proc-folder: App generated almost a thousand sub-folders

When I was searching with the "File Manager" app (com.alphainventor.filemanager) for some files in the root-folder, it generated hundreds (almost a thousand) folders in the proc-folder. [I don't have ...
2
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1answer
176 views

Which part of Android directories contains so-called proprietary blobs?

When building AOSP (Android Open Source Project) or LineageOS, there is a tool named breakfast. It downloads proprietary blobs and integrates them to the source tree. I have read this article, does ...
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1answer
184 views

How to find UID of an app installed on Android and use it as a shell user?

I am trying to find a way to determine the user name of the current shell user from within a shell / terminal on an Android device. The Android environment that I have in /system/bin and /system/xbin ...
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1answer
24 views

View list of registered document providers

How do I check in Android which applications have registered their document providers? I hope no code is needed (I need it from user perspective), but if that's the only way then I can attempt that.
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63 views

Remote Connection to Phone's File System

I have been researching how it is possible to gain access to a phone's file system using something like the phone number, IMEI number or other identification number in a similar way that I can SSH or ...
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24 views

What's a good place for public SSH keys on my filesystem?

I'm using an SFTP server app on my Android phone (RedMi 3S); it's a typical Android app, not something requiring root or run as an ARM binary from the command-line). This server app lets me define ...
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1answer
16 views

I am trying to move a file from sdcard to another device folder and it fails with error that file is not there, but it is!

I am trying to move a file from /sdcard to another device file and I am getting the following: mv: bad 'xxxxxxxx.0': No such file or directory while ls -l shows the file in directory. The device is ...
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0answers
33 views

Clone userdata from xcover-3 to xcover-3ve g388f -> g389f

I have some very special questions for you. My friend gave me a broken xcover-3 g388f. He wants the data on it, so I "Chip off" the internal memory and read it out with a chip reader. Now he came to ...
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1answer
198 views

Delete file with special characters from un-rooted device

How can I delete a file with special characters from an un-rooted Android device? I used a web site to download a YouTube video to my mobile phone. The video name contained special characters (...
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0answers
43 views

Path to sensors and GPS data? (for Android Terminal)

For battery information, the path is /sys/class/power_supply/battery. What is the equivalent path for barometer (hPa), brightness sensor (lux) and GPS speed, altitude, latitude, longitude, accuracy?