Disclaimer: There are many similar questions, but: 1) No answer there helped me, 2) This one provides additional info and questions, 3) Others seem to be related to Android versions < 8, so the scheme looks different. So it wouldn't really help adding a bounty.
I am using Android 8. As far as I could find, I cannot install apps directly to SD card. I have to install them regularly, and then move them via Settings -> Apps -> Workplace (App info) -> Storage. I mean to move Facebook Workplace to the SD card, and I keep getting "Not enough storage space". I have plenty of space there (more than 6Gb). The app shows as taking up 138Mb. I have 530Mb available in the internal memory.
What I tried:
- Moving other apps to the SD card. It worked.
- Removing and reinstalling Facebook Workplace. Moving to SD card. It failed the same.
- Ejecting the SD card and inserting it again. I had to rebuild my home screen, but still cannot move the app.
What I did not try:
- Formatting the SD card. I guess it is too much work to try, and many others reported it does not work.
- Reinstalling the OS. It is a corporate device.
- Rooting the phone. Ibid.
- A custom ROM. Ibid.
- Using an app. It seemed to me that this was required for older Android versions. Now Android has that capability builtin.
Other similar questions are:
Unable to move few Apps to SD Card . This answer provides reasons why an app might not support moving to SD, but I guess Android 8 is already aware of this, and shows the option only if possible. Plus, I wouldn't know how to tell if Facebook Workplace is one such app.
And none of this has an answer that helps me (many of these are very old questions):
Getting "not enough space" error even i have enough space in sd card
"Cannot Move App Not Enough Storage Space" Error Message
Getting "not enough space" error even i have enough space in sd card
why do I keep getting message saying unable to move app not enough storage space ?
Move apps to SD card in Marshmallow without using internal SD Card storage?
Why do I keep getting "not enough storage space"
More old questions:
