Guide: How to install Termux on the External Storage (Android Adoptable Storage)

[HaruYou27]

Requirement

1. Root access
2. Android shell access (adb shell or terminal emulation app)
3. SD card.

Step by step

1. You need to format your SD card as Internal Storage. Make sure to backup your data on the SD card before doing that.
2. Follow this guide on google support to format your SD card.
3. Go to Settings -> Developer Options and enable Force allow apps on external to forcibly move Termux to SD card.
4. Go to Settings -> Apps -> Termux -> Storage -> Move to SD card or Change storage or whatever similar option.
5. Now use a Root file explorer and go to mnt/expand/
6. You should see a folder here with a name like 60a327d3-d9af-49ca-99af-ff98f7ec86b0, that's where your SD card is mounted. (The name will be different but it's kinda look like that)
7. Go into that folder and locate com.termux folder in user/
8. Finally, you need to create symlink in /data/data/ because Termux is hardcoded to that location.

I use adb shell with root access, but an Android terminal emulator with root access might also works.

9. Plug your phone to your PC, I assume that you know how to setup adb.
10. adb root to get root access
11. adb shell to open Android shell
12. cd /data/data to go to where Termux expected.
13. ln -s <path to your com.termux folder> In my case it's ln -s /mnt/expand/60a327d3-d9af-49ca-99af-ff98f7ec86b0/user/0/com.termux
14. Open your Termux app and see if it's working fine.

[Biswa96]

If anyone is using this method with LineageOS termux may not connect with network after reboot. In that case, go to Settings > Apps > Termux > mobile data & Wi-Fi > toggle 'Unrestricted data usage' on and off. Now termux can connect with network. Follow those above steps after every reboot.

The issue and workaround was reported here https://gitlab.com/LineageOS/issues/android/-/issues/6444

[Musheer360]

I was able to install it on the SD card, but after each reboot Termux get reset, and it installs bootstrap packages again.

[HaruYou27]

I was able to install it on the SD card, but after each reboot Termux get reset, and it installs bootstrap packages again.

Did Termux re-install bootstrap packeges on your internal storage ? Some Android OS check all apps on boot and fix any abnormally.

[shiumano]

Alternatives that do not require root access
Step1. install apps that share permissions, such as Termux:API and Termux:Tasker (Termux:X11 is modern and does not share permissions)
Step2. move those apps to external storage.
Step3. https://play.google.com/store/apps/details?id=org.joa.zipperplus7 Put this app.
Step4. open Applications and find the apps you moved to the SD card.
Step5. display Details, long press on the Data part and copy it.

Step6. create a link to Termux for now. ln -s [copied path] ~ You may want to make sure you can access it.
Step7. you can move the Termux data there, but in my environment, the linker gave an error and stopped working. it would be safer to move only the proot.

pkg install proot-distro
mkdir -p $PREFIX/var/lib/proot-distro/
mv $PREFIX/var/lib/proot-distro/ [path of moved apps]
ln -s [path of moved app]/proot-distro/ $PREFIX/var/lib/

This will move the proot-distro data to the SD card.
The native Termux data will remain the same, but proot is generally huge enough to be effective.

[Biswa96]

"but in my environment, the linker gave an error and stopped working." - do you mean it does not work?

[shiumano]

Yes, I don't remember much better now that I don't use this method anymore, but I do remember that there was an error in some binary.
I moved all the /data/data/com.termux/files and created a symbolic link, but it stopped working properly.

It may work fine. Even if it didn't work, it would almost never be a problem with proot.

[HAKANKOKCU]

also root file manager isnt needed. as you can access filesystem from adb shell itself. you just need to cd/ls to the path at sdcard and copy it, then do the command at /data/data