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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13 views

Show filesystem of SD Card

I am not sure of the file system of the SD Card inserted into my S8. I imagine FAT32 or exfat. Is there a way to determine the file system of the SD card in an Android device? How?
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How much of the Android filesystem is visible over MTP?

When I plug in my Android device to my computer it gets connected as a media device under MTP mode. I can browse a bit of the folders on my device via my computer. I'm wondering how much of the device ...
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How to share files across multiple user in Android 10

I am implementing a app in which I am creating one file using openFileOutput API in Android. The file is saved to /data/data/com.xx.xx/files/ Now when I am switching to secondary user(multi user) I ...
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How to make a text file read-only in a non-rooted device? [duplicate]

I wanted to make a file read-only (440)in internal storage but it shows "failed",as it seemingly requires root permission but I can't unlock bootloader as of now so is there any means we can do the ...
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34 views

How do I backup my website homescreen shortcuts?

I have many websites which I constantly access thru my phone, but they aren't bookmarked on Google, they're just added to my homescreen as a web shortcut. Of course Windows is something else ...
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What are .xlog files and what can they be used for?

Im cleaning the storage on my S10+ and I noticed in the WeChat folder (Tencent) there are a bunch of .xlog files totalling nearly 3gb of space. I know the controversies of using WeChat but I rarely ...
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41 views

Is there a way to change the type of file system format an android device can read?

I am trying to write files larger than 4GB to an SDCard. The problem is that the andorid device I have can only read Fat32 file system formats in an external SDCard. What I tried: I thought that, if ...
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42 views

How to open huawei file safe on pc

So lately my honor 8x has been stolen and i wanted to get my files from the file safe on the device on my pc.How could I
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44 views

Accessing android app asset files

I am trying to extract some assets from a mobile game that I play. I have extracted the game files onto my PC, however have hit a wall when trying to view the assets. I am able to view some assets (...
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1answer
40 views

How to specify the directory path on external memory card?

An app currently saves files to "mydir" on the internal memory: /storage/emulated/0/mydir Instead, I want the files saved onto external memory card, but I am unable to figure out what is the right ...
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Securely storing keyfiles with authentication and alike

I am using Keepass as my password manager. I am using a keyfile for securing access to my database. However when I want to do the same on my android phone I have to store the keyfile in my phone ...
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1answer
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Folders missing in (some) apps

I have a strange issue. Just added some new folders in my Music folder after purchasing some new albums. Created them using Total Commander like always, transferred some mp3 files via ftp to the ...
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Files deleted via mtp still consume space

When I delete a few large files (part of music collection, ~20GB of flac files) during mtp connection (on computer), it disappeared from Android FS, but, according to FS analysis, still consume space. ...
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42 views

Where can I setup a persistent directory on my Android phone with a symlink-compatible filesystem?

I want to setup a directory on an Android phone which provides a similar experience to a traditional Linux command line. Normally I would work from my home directory but HOME in this case resolves /...
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Unable to change main system sounds coming from previous installation - Files names wrong cannot be updated on Android 9

I tried to change the sound for notification on my Samsung Galaxy S9+ (installed one year ago) When I hit the "name - button" of the sound, a panel is opened (see joined screen copy), it shows the ...
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390 views

Unable to flash custom ROM using TWRP, successfully installing AOSP extended, rebooting the device. Upon reboot it boots to TWRP instead of ROM

Successfully installed the AOSP Extended image for 'nicklaus'. Whenever I reboot my device to boot my device, instead of booting to the custom ROM my device automatically boot itself into TWRP ...
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71 views

Where Firefox for Android is keeping add-on generated files?

I want to find a folder, where Firefox for Android is keeping files generated by installed add-ons (list of saved tabs in OneTab, for example). I've tried to do a full root file system search (e.g. ...
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1answer
286 views

How to create filesystem in TWRP? Getting error: “Unable to format to remove encryption”

The screen appears after booting into TWRP and trying to format memory: I was trying to flash a custom ROM using TWRP recovery but it's showing Unable to mount storage & Failed to mount '/data' (...
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How to permanenlty disable mobile data by renaming or editing files or directories on rooted-device?

Yes, I read the answers to the question by the link Disable mobile data permanently but I'm interested in a solution related with directories and files on rooted-device and not in using an application ...
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77 views

Monitor and identify which apps create a specific file/directory

From time to time, there is a directory (and files inside of it) that is created on the internal memory of my device. I keep deleting it, but after a few days/weeks, it's back. The folder in question, ...
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1answer
2k views

How to share files between regular account and work account?

I've researched and I cant find anything. What I am missing?
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58 views

/system/media Directory

First of all, I am currently learning about Android security and wasn't sure if to post it on the Android or Security StackExchange, either way here is my problem... Investigating the content ...
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672 views

How to create and use multiple partitions on external SD card with different filesystems (Ext4, exFAT, NTFS)?

I want to create 4 partitions on external MicroSDcard through ADB shell commands, not on Windows or Linux. Also want to show all partitions in Android GUI (SETTINGS > STORAGE > SDCARD) and make them ...
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59 views

How to move 7GB ext4 partition on external SD card to 30GB partition on another SD card?

I had rooted my Android Lollipop 5.1.1 phone and installed Link2SD and linked installed apps on ext4 7GB 2nd partition of external SD card of 16GB size . The apps installed occupied 6.5GB space and I ...
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115 views

How to erase unsued space so that dumping userdata partition creates a sparse file of small size?

When I create a gzip image of userdata partition (/dev/block/mmcblk0p29) it creates huge 6.8GB image, previously it was 350MB. Is it possible through command-line to erase or wipe or delete space on ...
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How does Android treat files bigger than free space remaining while recording?

I've spent the entire day trying to solve this issue, it seems paranormal but (sadly) it's true and I didn't find a way to solve it. Yesterday I recorded a very important video using my Xiaomi and ...
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212 views

How to read ext4 filesystem without mounting on a non-rooted device?

I perfectly know it is not possible to mount an ext4 partition from a USB key without root. But in my case, I just need to read a password inside a .txt file (I don't have a PC right now and in the ...
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24 views

Create a link to a folder on homescreen with native filemanager on Android 9

I want to create a link to a folder that's on my sd-card. However if I long press on the native file-manager the only link it offers to open up directly is the images-folder, wich I then could drag to ...
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77 views

Recovering files from Android phone without usb port working and without root

I need to recover deleted files from samsung android phone but it have damaged usb port and no root privs. Is there a way to achive this? I thought about cloning the internal storage to SDcard or via ...
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44 views

File showing on device not showing on computer

I'm developing an Android application where some data is exported in a json file written in the Download folder. My objective is to get this file from a computer (when the device is USB connected). ...
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2answers
269 views

How to create a shortcut to some file in another folder?

I have a PDF on the folder ExtSD/Documents/. I need to make a shortcut of this file to the folder ExtSD/CurrentlyReading/. So simple on Windows... Apparently never asked on Android. If it's of any ...
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22 views

Access “downloads” folder within internal storage [duplicate]

I can see files within the "downloads" folder in internal storage on my LG V35 ThinQ phone. I cannot see these files from my Windows PC (phone connected to PC in USB storage mode). If I try to move ...
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55 views

How do I search the SD card with standard Android File Explorers?

My Android Pie SD card storage looks like this: . ├── Android | ├──data | | ├── com.amazon.mShop.android.shopping | | | └── ... | | ├── com.amazon.venezia | | | └── ... | | ├── ...
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1answer
124 views

Why bowsers cannot download files to storage (path looks /dev/null/Download)?

The phone is Samsung Galaxy Note N7000. For the last few years I use NightOwl custom rom (Android 7). I do not remember when I faced with this problem, maybe after repartitioning with REPIT (but ...
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1answer
20 views

I don't know how these files got in my photos

I get photos saved in a folder named files, I don't know the people in the pictures . there not photos I took ! How could they have gotten into my phone? and details show /storage/emulated/0/Android/...
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94 views

My SD Card gets corrupted every time my phone reboots or shuts down

I have a 32GB SD card, however, every time I mount it into my phone (Huawei Y5II), it shows a message that the SD card is corrupted and I should reformat it. I backed up my files to my PC, and ...
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1answer
202 views

Can disk quotas be disabled?

$ cp a b Cannot write to 'b' (Quota exceeded). # df -h . Filesystem Size Used Avail Use% Mounted on /data/media 110G 102G 7.8G 93% /storage/emulated I can copy the file perfectly fine in ...
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Is it safe to delete the Android “.HiddenCabinet” folder?

I wish to remove the entire Hidden Cabinet (".HiddenCabinet") directory tree and all its components. Is it safe to simply delete that folder without disrupting the rest of the file system? Are there ...
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158 views

How to recover unsaved video file on Android?

I've got a Samsung S9 phone and today I was taking a lot of photos and videos. For one video we pushed record for about 30 seconds and then pushed stop. It appeared to have been recorded. However, ...
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1answer
40 views

Unable to copy the files to /system/app

I am working on i.MX 6Quad SABRE-SD with Android 9. I am facing some problem when copy the some data to system/app from USB Mass Storage, I got error, when I mount the system to write access: ...
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529 views

What is default “fstab” file in Android?

As I known, in Android 9, system and vendor are mounted in the first stage of init by parsing fstab from device tree. But, there is another fstab parsed in init process, it is device default fstab, ...
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234 views

Explore files using Android Studio

Is it possible browsing the device filesystem with the current version of AS? I've read that in the menu View > Tool Windows > Device File Explorer there should be the suitable tool, but I cannot see ...
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1answer
37 views

How does Windows interact with Android Internal Storage?

I have a simple question which I can't find the answer for We all know that Microsoft Windows doesn't support partition formats such as ext4 or f2fs, however even this being the case, how can it ...
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25 views

In which Android system file can I remove Wi-Fi password field?

If I would root my device based on Android (v4.0.4), which system file and how can I change to remove from the graphic interface the field where we manually type a password when connecting to new Wi-...
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2answers
9k views

How to unpack/repack system.img of android ROM?

I have OnePlus 6T device which has A/B partition system and has a ROM of user type i.e [ro.build.type]: [user]. This device is rooted with Magisk. I have a requirement(Want to place customized ...
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1answer
10k views

How to disable dm-verity on Android with “user” build type ROM?

I have One Plus 6T Android device which has a ROM of build type user. This device is rooted with Magisk and I want to disable dm-verity on this device. I have tried to run adb disable-verity but I got ...
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52 views

Camera folder displayed as empty, but contains 20GB data

My Lenovo Moto G5 Plus' internal storage ran full, and now there appears to be a problem with the photos that are saved on its internal storage. The internal DCIM/Camera folder is displayed as empty ...
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23 views

In Android 8, during video recording, how the data is saved to disk?

In Android 8, during long video recording, 1) how often does the recorded video data is written to internal storage? 2) What is the size of each piece of data written? 3) Is the data stored ...
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1answer
228 views

Does Android 8 has journaling enabled in its ext4 files sytem?

Android 8 uses stackable file sytem called sdcardfs, which emulates FAT32 on ext4 on the data partition. Does sdcardfs recognize the ext4 file system and journaling? In other words, files written ...
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60 views

2 folders of same name in internal storage of Oneplus3

Currently on my phone, i have 2 folders of the same name. The content of both folder shows 0 bytes. EDIT : They are exactly the same. And the subfolders and files are also same with 0 bytes content. ...

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