Background 1) Using a file explorer I can select an HTML file and it will start the default browser and then do its thing. 2) The HTML file is on an inserted SDCARD 3) In the browser, the HTML file takes some options and displays text relevant to those options The reverse does not work (The Problem): 1) In a browser I enter the path for the HTML file shown by the file explorer 2) An example: the file explorer shows the path as **/storage/####-####/folder/filename.html** 3) In the browser I enter **file://** then the path above (####-#### is 8 numbers in two sets of 4) 4) This generates the response: "Access to the file was denied: it is not readable. may have been removed, moved or file permissions may be preventing access." There is no user code I wish to enter the file URL within the browser so it can be bookmarked for easy future access

I'm trying to figure out what is stored where on my Android phone (an unrooted Samsung Galaxy S8 with an SD card). I can examine the phone's contents either via any of the several file manager apps I've installed, or by mounting the entire phone as a network drive on my Windows 10 machine. My File Manager App shows me the contents of "Main Storage" and the contents of "SD Card". The contents of "Main Storage" show up on the network drive in a directory called /sdcard. The contents of "SD Card" show up on the network drive in a directory called /storage/0000-0000 . This is very odd, since the directory called "/sdcard" on the network drive is the *opposite* of the directory called "SD Card" in the File Manager app. The File Manager app shows 57 gigs total in "Main Storage" and 256 gigs in "SD Card". This suggests to me that the former is the phone's built-in memory and the latter is the actual SD card. But I'm thrown for a loop by the fact that the former is called "/sdcard" and the latter is called "storage/0000-0000", which seems backward. I could, of course, pull the SD card out of the phone and examine its contents directly on another device, but I'm squeamish about handling the card. And no matter what I learned, I'd still be curious about the odd naming conventions. So: Question 1: What's going on? What's in which directory? Question 2: If I want to back up all of the data (but not the system files or software) on my phone, does it suffice to make copies of /sdcard and /storage/0000-0000, or are there other places data might be stored? Additional Info: The App X-plore confirms the odd naming, in that it shows me two directories, one named both "Phone Memory" and /sdcard (it shows the former in bold and the latter in roman, both labeling the same directory) and another named both "SD card" and /storage/0000-0000.

I recently bought an Intenso microSDXC UHS-I Premium card, formatted it as internal storage, and the content has been moved without any errors. But after that, the phone started having several issues: - Most photos, videos, music, and recorded audio files are missing. - Some apps—like CamScanner, Foxit PDF Reader, and the camera—don’t work. - WhatsApp media (voices, images, videos) can’t be downloaded or saved. - App updates can’t be installed. - Storage shows a negative value (see attached photo). I’ve tried common fixes online and contacted the manufacturers, but nothing has worked. I also couldn’t find an option to reformat or separate the internal storage from the SD card. What would be the best next step? Should I try reinserting the SD card and choosing "forget" option, enable “Force allow apps on external” in Developer Options, or is there a better solution to recover the files and resolve the storage issues? - Device Name: Redmi Note 9 Pro - MIUI version: MIUI Global 12.0.3 Stable 12.0.3.0(QJZMIXM) - Android version: 10 QKQ1.191215.002

**System**: rooted Samsung Galaxy S10 with Android 10 I have replaced my old external sdcard (128GB) with a new and bigger one (512GB). The old card was automatically mounted to /storage/6639-3031. The new card is mounted to: /storage/9C33-6BBD. Since I have a lot of configured appz that use custom paths pointed to /storage/6639-3031/somesubfolder I would like to change the new id: 9C33-6BBD back to the old one 6639-3031 system wide. Since there is no fstab in Android responsible for this and I cannot find **where this id's are stored in Android**, maybe some experts here can help me? It seems like a simple problem but I did not find the solution yet. Some clues I already found: 1. Android equivalent of /etc/fstab? 2. Remount FUSE partition Once I have found where this external sdcard id is stored, **can I just change the id** (I have **root**)? **Will it be stay changed after reboot**?

I've been having trouble getting my Android devices to recognize my SD card. Despite formatting it to FAT32, none of my Android devices can detect it. However, when I plug it into my Windows or Linux machine, it's recognized without any issues. I've tried reformatting, checking for errors, and using different SD card readers, but nothing seems to work. Has anyone else experienced this problem? Any suggestions or solutions would be greatly appreciated!"

I have a similar goal as discussed here 5,5 years ago: But I'd prefer to use a file-based approach on-top of a "removable storage" setup managed by Android, so I can dynamically choose how much of it I want to use to store my private encrypted files only readable by this phone and other devices where I enter the key - and how much for unencrypted files I can share with other people by removing the microSD-card from my phone. I managed to easily setup a gocryptfs volume using the DroidFS app installed via F-Droid and also mount it via a Termux root shell with gocryptfs /storage/67DF-FCFD/DroidFS /mnt/crypt -nosyslog -allow_other The remaining obstacle is how to make that decrypted view = mount of my gocryptfs volume available for any app to read from and write to? I thought I could use a bind mount, see also: and But so far everything I tried failed:

# mount | grep /crypt
/storage/67DF-FCFD/DroidFS on /mnt/crypt type fuse.gocryptfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,max_read=1048576)
tmpfs on /mnt/crypt type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,size=3900340k,nr_inodes=975085,mode=755,gid=1000)

# ls -alih /mnt/crypt/1/
total 5.2M
1048987 -rwxrwx---. 1 root media_rw 773K Mar 11 22:06 IMG_20250311_220628_348196.jpg
1048988 -rwxrwx---. 1 root media_rw 2.1M Mar 11 22:06 IMG_20250311_220639_873732.jpg
1048989 -rwxrwx---. 1 root media_rw 2.1M Mar 11 22:06 IMG_20250311_220644_933558.jpg

# nsenter -m -t pgrep rs.media.module -- mount -o bind /mnt/crypt/1 /storage/emulated/0/crypt
CANNOT LINK EXECUTABLE "mount": library "/data/data/com.termux/files/usr/lib/libtermux-exec.so" not found: needed by main executable

$ su -Mc mount -o bind /mnt/crypt/1 /storage/emulated/0/crypt
mount: '/mnt/crypt/1'->'/storage/emulated/0/crypt': No such file or directory

Please help! Thank you :)

I recently acquired a replacement phone and as soon as I mounted my existing SD card, the files disappeared while the SD card is showing the storage is in fact used. When I looked at it further, it seemed that Android recognized the files as 'system'. Now, even mounting it on Windows through an SD card reader doesn't work. However, if I use the MTP USB storage mode, it does show but without the files (just shows an empty SD card). Is there a way to undo or recover these files?

Here's my situation: I have a Sprint Samsung Nexus S 4g. It is rooted, unlocked, and loaded with CyanogenMod 10.1. I am attaching it to a Windows 8 machine via USB cable. Recently, the phone went into a boot loop, and thus I can only do anything with it in recovery mode. I'm trying to transfer the stock ROM to the phone for loading. I follow these steps 1. I boot into Recovery mode 2. I go to Mounts and Storage 3. I mount the USB card 4. In Windows, I open up the phone in explorer, and copy the update.zip file to the root of what is now the G: Drive on my phone. 5. I try to load the ZIP file for processing. Recovery says "Can't open file /sdcard/update.zip" 6. I reboot into recovery again to 'refresh' things. At this point, the file that I loaded is gone! It's not on the SD Card anymore. I can't find it via Recovery mode, and if I remount the USB disk, it's not visible in Windows either. Weird, huh? One other thing to note: I've wiped and reformatted everything I can via Recovery (Cache, system, data, Dalvik, everything) and yet when the phone occasionally manages to boot all the way to the OS, I can still see my wall paper. How can I get the files I copy over to actually stay on the phone? Any ideas on what is going on? I just want to wipe this phone and start over, but I can't seem to make that happen. Thanks. More: Okay, I formatted and wiped everything that I could. And now the phone only boots to fastboot mode. I mount the USB card, move a ZIP over, and double check it in Windows. I can open the file on the phone. But when I unmount the USB card (I have no choice), the ZIP is there, but the phone won't read it. It says "Can't open (bad)". This is trying with CM9.1 and I'm 100% sure it is the right version for my phone (crespo4G)

How would I go about encrypting my brand new 256GB SD-card, which is meant for my Android phone, considering the following: - Card should be usable across multiple Android devices, and other platforms (Linux..). As a consequence, native Android SD-card encryption is not a solution as the contents are not readable on other platforms, nor recoverable if the phone fails or needs a reset. - Use case is protecting data, mostly pictures, from phone thief/finder, **not** from a gvt agency or police. My understanding is that most encryption methods are broken on Android for these purposes as the keys are often accessible from memory. In that sense, the phone is considered trusted once unlocked, so encryption should be transparent so that files are accessible via standard phone apps (i.e. pictures show in Gallery). Ideas: - Full disk encryption methods such as Luks. I found this program : EDS which apparently can mount Luks volume if the phone is rooted. I have no idea how efficient this is performance-wise, or if it is safe for the card. - Commercial programs using their own file-based encryption but available on multiple platforms such as Boxcryptor, or Cryptomator. Their purpose is originally to encrypt files before storing them in the cloud. It doesn't seem that I can access files using regular apps using this solution. - Changing my phone to one on which I can install UbPorts :) - Using Termux and rooting the phone to mount a gocryptfs or other encrypted file system - Using Android default sd card encryption (FDE/FBE), dumping memory to get access to the encryption key and using that from Linux to access files - Other welcome idea ! I cannot find any info about this use case which seems very strange to me.. Thank you very much for any input !

I don't even know where to start. I know that I need an SD card reader and my laptop. What size SD card do I need? How do I put the OS onto the SD card? And then how do I put it into the phone? Can someone help me with the right steps?

I’m trying to organize photos and files stored on an SD card using file explorer apps on my smartphone. However, I’m facing an issue where simply moving files to another location within the SD card using these file explorer apps causes the creation date of the files to change. For instance, after moving files to a different location on the SD card using a file explorer app, then disconnecting the SD card from the smartphone and connecting it to a computer, I can see that the creation dates of the files have changed. I have tried using various file explorer apps (such as X-plore and Total Commander) to resolve this issue, but the problem still persists. Currently, I am using a Galaxy Note 20 Ultra 5G with One UI version 5.1 and Android version 13.0.

A few weeks ago I integrated my SD card to use as phone memory. Everything was fine until a couple of days ago. All of a sudden I saw the "insert SD card" notice appear on the notification bar. I open the back cover but the SD card looked like it was in place. I remove it and insert it back and the notice disappears. But then I notice that when I go to file explorer (FX) to access my files, it says "Access was denied". I can't access anything that is on my phone memory, although the apps are working. I guess system files are OK, but everything else is not. My phone is rooted so I tried to access the files through TWRP but I can only see system folders. Phone is a Moto C plus. Nougat.

I open my settings and go to application manager. Then I move some apps to SD card. After that, I insert the SD card into another phone. But the apps don't appear.

My laptop runs on stable Arch Linux. My tablet is running Android 14. I have apps that are linked to a dead card that are very difficult to change the link to. Now I do know you can randomly get a new volume serial number. The thing is, can you deliberately change an SD card volume serial number=1234-abcd to volume serial number=0987-mnbv? The card is formatted to exFAT. Plugged in a slot but listed as external SD. Already has data on it that I do not want to lose. Edit: exfatlabel works. Note:To change volume serial number must use 0x12345678 instead of 1234-5678. Follow the linked notes.

I integrated my SD card to use as phone memory. Everything was fine until a couple of days ago. All of a sudden I saw the "insert SD card" notice appear on the notification bar. I open the back cover but the SD card looked like it was in place. I remove it and insert it back and then I formatted it as external then the notice disappears. But then I notice that when I go to file explorer (FX) to access my files, it doesn't show anything like the internal storage doesn't exist, crashes my settings when I click storage. I can't access anything that is on my phone memory, although the apps are working. I guess system files are okay. My device is not rooted and it seems the only thing I can do now is to format my phone..I don't want to go that route please.

When traveling I usually only have my tablet (Samsung Galaxy Tab S8+) with me but not a real PC. So to have a quick check of the pictures I took during the day with my DSLR camera I'd love to use the big tablet screen (or even the hotel TV connected with HDMI) and not the small camera display. So I got myself an USB-C "dock" that can read SD Cards (and also output HDMI). Using the Samsung file viewer I can now see the internal storage, the SD Card (which is the micro SD in the tablet internal reader) and also "USB storage" - which is exactly the SD card from my DSLR that I want to view. So everything could be fine. But no gallery app that I tried could access the "USB storage". The only thing that worked was to open an individual picture by selecting it in the Samsung File app and then choosing the picture viewing app. But even in this case the viewing app couldn't open any other picture of the USB attached SD card by itself. What possibilities do I have to view my pictures in such a setting where the SD card is in a card reader connected by USB?

I'm trying to run an app (Einstein, the Apple Newton emulator) and it is looking for the ROM image in /sdcard/Download/Einstein, but my Samsung Galaxy Note 10+ displays the sdcard path as /storage/6E8B-161E. Is there a way to fix this?

The first picture below shows what is displayed in the "My Files" app on a Samsung tablet after loading a microSD card into it which is formatted in a filesystem which is incompatible with that particular Android device - APFS -, for example. It says "No SD card", though seemingly it recognizes that one is loaded into the device judging by the GUI of the menu. It seems a very odd and unclear way of telling the user that the SD card loaded is incompatible with the device. So, can someone just confirm that this is normal and that this is exactly how the screen should look if you load a microSD card into the device whose filesystem is formatted in an incompatible format? The second picture just shows my device's details.

I bought a 512GB SD card, but right after I investigated the characteristics of the Redmi Note 8 and everywhere, it says that it supports up to 256GB memory. I got frustrated but still, I inserted the memory to see what happened. I was curious, but nothing happened out of the ordinary, the phone accepted it, so it seemed suspicious to me. If I leave it inside, do you think it will have an impact on my cell phone?

I have two tablets: Allwinner A10 single-core 10 inches (old one) and Allwinner A31 quad-core 9.7 inches (new one). I notice that sometimes when not using the tablet's standby mode, the battery drain is 20 to 30 percent, there's also a little heat near the battery on the back of the tablet, and it sometimes becomes slow so I have to restart anyway. (I install lots of programs, software, browsers, readers, games, movie/music players. Recently the tablets are filled with Android applications.) A couple of questions: 1. Should I keep my Android tablets power off or leave them on standby mode? Which option is better? 2. Will turning the tablet off at night when not using it increase the tablet's life? 3. Will it increase the battery life in terms of charge/discharge cycles if the tablet is left off when not used? So it increases battery longevity for years? 4. Will it also increase the life of the memory card and flash memory (as they are dependent on read/write cycles)? Something might be getting written to them by some background programs if the tablet is on standby? 5. Will it also increase the MTBF (mean time between failure) and longevity of the ARM processor and other electronic chip components, etc., of the tablets?