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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How toolbox symlinks work

On my Android emulator, the /system/bin folder contains several symlinks that point to the toolbox binary: # ls -l /system/bin ls -l /system/bin [SNIP] lrwxr-xr-x root shell 2012-08-...
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1answer
46 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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1answer
198 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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1answer
2k views

Is it possible to have a media folder inside a .nomedia folder?

I have a folder with various folders and subfolders where I don't want my content to be scanned. Inside that folder I have put a .nomedia file to prevent media scanning. Now, I have a single folder (...
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1answer
3k views

How can I extract NON-HLOS.bin from my Motorola Moto G xt1032?

I want to extract that file in order to restore my wi-fi on another Motorola Moto G How can I do that ?
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1answer
484 views

How can you get a local filesystem link of an offline-accessible PDF file in Dropbox?

I would like to get a link to a pdf file in my local Dropbox of my android. This is because I want to access the file by the syntax /local/system/something/file.pdf#page=116 in Internet Browser. I ...
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1answer
1k views

Where does Lollipop stores notification policy?

Unlike its predecessor Android versions which saves notification policy in the file /data/system/notification_policy.xml (the file which saves the package name of apps you've selected to stop giving ...
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2answers
3k views

Where in the filesystem are settings saved? Namely ADB backup password

Where in the phone filesystem are settings saved? I've lost my ADB backup password and simply want to delete it. If it affects other settings that won't matter too much. I will be interfacing the ...
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1answer
2k views

Missing 2.2 GB of space on my micro SD card

I pulled my micro SD card out of my phone (LG G3) and inserted it into my PC (Kubuntu 14.04). I was in the process of moving several large video files off of the SD card onto my computer. Moving these ...
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1answer
7k views

Create a dd image of a Android 4.4.4 for forensics?

I'm a little new to the Android file system, I'm doing a project for a digital forensics class and I want to create a bit-for-bit image of my Nexus 5 running 4.4.4 stock, rooted. The normal way I ...
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2answers
25k views

How do I make /sdcard link point to external SD Card on Android 4.4.2?

I've got a Samsung GT-I9505 phone with Google Edition Rom installed. As my phone comes with 16Gb internal storage, I bought a 32Gb microSD. However, the phone still uses emulated SD card to store all ...
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1answer
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Should the sdcard support case-sensitive files?

I've been testing one of my apps to see how it handles filenames in UPPER-CASE. I thought the Android libraries and system was case sensitive for filenames, however I eventually discovered that files ...
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1answer
10k views

Link2SD proper usage

I have a 64 GB micro SD card. I partitioned 1.2 GB as Ext2 with Mini Partitioner (highest option was about 4 GB). This is great and all, but from all of the literature I've read, Link2SD seems like ...
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1answer
2k views

How can I access files on a Seagate GoFlex Satellite wifi or Kingston Wi-Drive?

My final goal is to programmaticaly access files on a Wifi/USB storage device, like a Seagate GoFlex Satellite wifi or Kingston Wi-Drive (preferred because less expensive). The storage devices are ...
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1answer
3k views

Android chroot ubuntu - is it possible to get ubuntu to recognise usb devices

I've managed to setup the chroot but I'm unsure how to get the chroot to recognise usb devices. I'll be doing so work with microcontrollers hence I neeed to to recognise my usb based programmer. For ...
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1answer
2k views

How can I browse my Mac's hard drives with my Android phone?

Is there any Android software that can understand afp or browse OS X filesystems some other way ?
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1answer
75 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
213 views

Why is TRIM not supported on encrypted “/data” partition?

I have a rooted Lenovo A369i. I use LagFix (fstrim) to TRIM partitions. Previously it was working well with /data but after I encrypted my phone it doesn't. I decrypted my phone by formatting. But now ...
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1answer
12k views

/system cannot be remounted as RW, even when rooted (Sony Xperia E3)

I rooted my Sony Xperia E3 (D2203) a while ago using Kingroot, which worked flawlessly. Before rooting my device, /system could be accessed, which is how root was installed in the first place. ...
2
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1answer
512 views

Shred an internal or system partition

There are quite a few apps that lets a user delete the media or data partitions so it won't be recoverable - by re-writing "junk" data over and over again on the free storage space. Still, is there ...
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1answer
2k views

How do the various tools to convert a system image to f2fs work?

Recently I've been trying to install a f2fs compatible rom to my old and slow nexus7. I got as far as flashing a new recovery image and reformatting the device partitions to the new file system, but ...
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1answer
2k views

No USB Storage Mode on GalaxyNexus running 4.2.2

I have a GalaxyNexus running Android 4.2.2 I just want to quickly backup some data files to my PC. I'm pretty sure I've done this many times before, but I guess not on this phone. I have the Android ...
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2answers
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Where to put supersu zip file while rooting HTC One M8

I'm following the instructions at http://htc-one.wonderhowto.com/how-to/unlock-bootloader-root-your-htc-one-m8-0154444/ and have found a stage where I don't have enough information, which is at Step 9 ...
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2answers
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How do I record a ~45 minute 1080p video with external mic?

I am currently using the camcorder function that comes with lgcamera because it allows me to use the microphone as the source of sound input. But I found that it stops when the recording size reaches ...
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1answer
1k views

External harddrive case to spin-down drive when idle

I try to make external 2.5 hard drives automatically spin down when idle and connected to android devices. The device I have got in mind is a HDMI TV-Stick with USB connector. I tried a few cases/...
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2answers
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I modified vold.fstab and lost access to my SD card

Background: I have Samsung Galaxy Ace GT-S5830, which has very low internal memory (181 MB). I have an external micro SD card of 16 GB, but still couldn't install many apps due to insufficient ...
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1answer
3k views

How to partition SD card in HTC One X?

I was trying to create ext2/ext3/ext4 partitions on the SD card. I tried ClockworkMod recovery and it didn't work. Nothing seems to have happened. I also tried using MiniTool and that also failed. I ...
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1answer
498 views

SD Card partition named differently on different devices - breaks music player

I have recently moved from a Droid 2 to Droid 3, both running Android 2.3. The same SD card registers as "sdcard" on the D2, and "sdcard ext" on D3. Probably for this reason, I am having problems with ...
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1answer
345 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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0answers
243 views

How does “Recycle master recycle bin” app recovering deleted files ? [closed]

There are many apps that recovers deleted data(images, video, PDF) i.e Disk digger , Dumpster e.t.c and these apps also ask for root , but here i want to know the process/methodology of simple ...
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924 views

Open local file from Excel Cell in Android

In Android, I wish to open a local file from a Hyperlink in Excel. XLSX file and the linked image are in the same directory folder. I've tried the following: =HYPERLINK("cat.jpg", "Cat") =HYPERLINK("...
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559 views

Change video timestamp on non-rooted device?

I thought I'd be clever and compress some old video files taken with my phone camera using the Video Dieter 2 app. It worked fine, except the new files have new (random) names and their modified ...
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0answers
154 views

Where are the PRL and profile stored on the filesystem?

I'm talking about what can be updated in Settings->More->Cellular networks->Carrier settings. Where are they stored? On what partition and where, if anywhere, on the filesystem?
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93 views

When should I run a consistency check on my removable MicroSD card?

I own an Android device with a removable MicroSD card. The card uses either FAT32 or ExFAT technology. These are "non-journaling filesystem" technologies, so the data on the cards can become corrupted ...
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0answers
97 views

How can I run a consistency check on my removable MicroSD card?

I own an Android device with a removable MicroSD card. The card uses either FAT32 or ExFAT technology. These are "non-journaling filesystem" technologies, so the data on the cards can become corrupted ...
2
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0answers
1k views

delete operation are extremely slow

For some reason, moving files from my Nexus 5X to my PC takes huge amounts of time. The copy "part" of the move operation is pretty much as fast as on any other Android device I've used (I can see ...
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801 views

Install system app fails

I have a Samsung Galaxy S7 which I have rooted. I am attempting to move app updates to /system/app to save space on my /data/ partition. I follow the standard process (not enough points to link yet): ...
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1answer
895 views

How to make bind-mounted (mount -o bind) folders visible for non-root users?

I want to mount-bind an app data folder in /data/data/... to a user subfolder in order to automatically synchronize the contents for backup purposes. As root I use the following command: mount -o ...
2
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1answer
743 views

Android locked MicroSD card (all files read-only)

I own a Wiko Rainbow with Android 4.2.2. Out of the blue my MicroSD card got locked and I can neither create nor delete any files on my phone (such as photos). At first, I did not even understand why, ...
2
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1answer
626 views

linux kernel not seen from android filesystem?

I'm reading 'embedded linux' and in chp.6 "filesystems" there is a figure that I do not understand. here it says that the 'linux kernel' is not seen from android filesystem. This give me some ...
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0answers
185 views

Setting creation time attribute on exFAT to “atime” from ext4

I have to move files from my internal storage to the SD Card. While cp -p does its job fine to an ext4 formatted card, moving/copying files to exFAT only keeps the file modification time but sets ...
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0answers
608 views

Phone stuck at boot logo, cannot wipe data/factory reset

I will explain what happened: I opened up terminal emulator then typed cd /system/xbinls fsc* then /dev/block/vold/179:17 then mount then my tab got stuck and then it switched off automatically. ...
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0answers
144 views

Retrieve Stock Browser History?

I have a Galaxy S4 and today 45 browser tabs I've been using for about six months just disappeared (should have been bookmarking things, yes). Is there a way I can retrieve my browser history via my ...
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0answers
368 views

Is there any working method to mount Ext4 partitions on 64 bit Android 5?

Is seems that, as for today, there are no working methods (apps or hacks) to make Ext4 partitions work (read/write) on my Android v5.1 64 bits. My device is a Jiayu S3 with a Xtreme ROM (not stock, ...
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0answers
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File copied to /system/bin keeps disappearing

After copying Sqlite3 to by /system/bin folder, the file disappears. I can successfully change the folder to rw and modify the file properties on sqlite3. However, as soon as I remount my /system as ...
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1answer
1k views

Is it possible to restrict an app's permissions to a specific folder(s) (and subfolders)?

When installing an app, depending on the app, access to the filesystem is required and requested at the time of install. Is it possible to restrict this to specific folders(s) and their subfolders? ...
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0answers
202 views

What are these small 8-4-4-4-12 hexdigits-named files in root dir?

(Post edited to add more info.) My Android phone contains, in the lowest user-accessible directories of both phone storage and SD card, several small files named xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx ...
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0answers
659 views

Select file from Downloads to upload via web form

I'm on a Samsung Galaxy S3 and want to upload a file from my Downloads folder to a website using a form on that web page. But when I click the button to browse for a file to upload, I can only select ...
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0answers
1k views

Should I switch to F2FS?

I've heard a lot of hype about Samsung's filesystem named Flash-Friendly File System (or F2FS for short). I've heard about cases where the device apparently worked faster after switching to this ...
2
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1answer
587 views

Recover files of an App

My phone is a Motorola MOTO G (first generation). Due to some troubles, I had recovered the factory settings of my phone. But I forget to backup some data of an app (Tricount). A this point my phone ...