Question :App2sd link2sd how to show mount view 2nd micro sd card ext2 partition

I had loaded twrp recovery (fastboot boot twrprexovery.img) in bootloader mode and installed SU and rooted and then installed app2sd and link2sd apps.

I had partitioned my 64 gb memory card 30gb fat32 and remaining 32 gb. As ext2 and then when I tries to view partitions in android 5.1.1 settings>storage it show only one fat 32 partition in sd. Card and not second sd card for ext2

As I want to install 2nd sd card and from recovery or adb pull take NANDROID image backup Of second partition backup in cloud and want to see pace and access file system so that I can recover if any thing goes wrong or memory card got corrupted

My queries:-

  1. How can I view second partition of external micro sd card partiton through file manager or in setting> storage

  2. Can I be mounted In boot.init through any aap

  3. App2sd auto created a mount script to run through recovery to mount the ext2 partition how to run it in twrp so I have to run through install

  4. How to take NANDROID image backup of system boot recovery internal (userdata partition) and external sdcard 1st and 2nd partitiion and save it in usb drive or cloud storage through adb pull or twrp. Or any other apps how can these files be secured in password or encrypted in cloud

  5. As app2sd pro or link2sd plus card link apps and moves lib hex odb files to which files which are randomly access should be not moved to sd card and should be left in internal memory.

types of files to moved app2sd link2sd

types of files to moved app2sd

type of files to be moved link2sd

app2sd settings linking

app2sd eroor mounting script screenshot

app2sd eroor mounting script screenshot

eroor app2sd mounting script

link2sd error mounting script

link2sd error mounting script

  • Already explained in my answer to your previous question: android.stackexchange.com/a/220042/218526 Commented Sep 28, 2021 at 6:30
  • @irfan Latif bro questions are different I had asked to a tool apk to view backup copy external sd card ext2 partition nandroid img file to clous or usb and viewing it in setting>storage and that question about parting sd card Commented Sep 28, 2021 at 6:45
  • 1
    Correct. But I didn't say the question is same. I said what you are asking is already explained there. Spend some time to read and understand things so that you don't have to repeatedly ask similar questions 🙂 Commented Sep 28, 2021 at 6:49
  • @alecxs Bro I am using link2sd version 4.3.4 patched by apkmos tried to install link2sd plus also but it didn't showed now link2sd is giving error for ceating mount script and app2sd pro when I created partition told me to load install script in boot.init but I didn't notes it flashed back... The link2sd is not moving or linking apps whereas app2sd is linking app but on every reboot it gave error of softboot and. Ask to recreate boot script i will include error photos in question for ur guidence kindly view question as in chat no option to attach photo Commented Sep 28, 2021 at 17:58
  • make decision which app you want. uninstall others. read the howto and troubleshooting section. Follow the instructions (have you disabled namespace separation?). If linked apps not available during boot, reason is partition is mounted too late. post location and content of mount script.
    – alecxs
    Commented Sep 28, 2021 at 18:56

1 Answer 1


TWRP is not compatible with Link2SD, therefore one must manually mount MicroSD Card 2nd partition each time before TWRP backup/restore is started.

One can do this from - TWRP menu - Advanced - Terminal

mount /dev/block/mmcblk1p2 /data/sdext2

TWRP backup will include 2nd partition in data.ext4.win as regular directory sdext2 therefore it is important to double check /data/sdext2 is actually mounted before restoring process is started, otherwise TWRP will try to restore all files into phone storage /data instead (and probably run out of disk space)

If you prefer to create separate TWRP backup files for 2nd partition (instead of mixed userdata) this can be done from TWRP backup menu.

It requires modified TWRP recovery. Unpack twrp.img ramdisk with AIK and add new entry in /etc/twrp.fstab

/dev/block/mmcblk1p2  ext4  /sd  flags=display="MicroSD 2nd Partition";backup=1

This will show you separate entry in TWRP backup menu and create separate sd.ext4.win backup files

  • @alcex bro thanks a lot for great advice support knowledge ....bro it may help me to...take backup of external sd card second partition backup from twrp backup ... If 128gb micro sd card is placed and I create 3 parttion and dictate third ext4 partition for twrp image backup storage so that when I need revoer I recover from t he third partirin within moments from twrp recovery.... Can we mount 3ed partition and save the twrp backup ext4 images on 3rd partirin to Commented Sep 30, 2021 at 13:42
  • TWRP backup can only saved to 1st partition (what's wrong with this?) But you might succeed with external HDD connected via USB-OTG (or cheat TWRP by mounting 3rd partition into /usbotg)
    – alecxs
    Commented Sep 30, 2021 at 13:55
  • bro twrp backup is saved in first partition which is fat32 and it creates a ext4 named file in fat32 ..secondly the reason to theis partition is to permanently store there dedicate for it and recover whenever wherever it crashes...as in pc laptop there is a button to recover windows hard disk image as when button pressed it recovers from windows shadow or small image restore from a.partition disk image saved in ..within minutes... So I want that to keep images in parttion and recover whereaver it goes wrong Commented Sep 30, 2021 at 14:33
  • can external HDD be connected through otg as its need voltage from usb ...I have laded usb from otg bit not tries external hdd.... There used to come external hdd casings can it connect hdd to Commented Sep 30, 2021 at 14:35
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    @alcex bro thanks for guidance and help all link2sd worked successfuly and that to chainfire super user pro thanks all modified and.mobile.working fine thanks alot beo Commented Oct 2, 2021 at 18:48

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