Help Rooting Vivo y81i and making adoptable storage (internal external sd card storage)

[David Pasion]

Hey, I own a Vivo y81i. Has there been any new TWRP releases for this model now? The one on these sites (https://www.stupdroid.com/2018/08/Vivo-Y81-root-twrp.html and https://www.howtoapps.info/how-to-root-vivo-y81/) linked were for Vivo y81 (not for y81i). I've read somewhere that however similar a TWRP you found is to the TWRP you need is doesn't matter and won't work if they're not completely identical... (is that true?)

Another problem I have: I was planning on making an adoptable storage (using an SD card as internal storage). I've successfully followed this set of instructions: (https://highonandroid.com/android-h...rage-for-galaxy-s7-s7-edge-adoptable-storage/) but it still didn't work. (There is no built-in option to install an SD card as internal in vivo y81i so I resorted to the solution indicated in that last link). It just makes my 64 gb sd card unreadable after entering "sm partition disk:179,128 private" (but works again after I reformat it with a different device that recognizes it). I tried doing the same method again but now entering "sm partition disk:179,128 mixed 50" making only 50% of the sd card as internal and the other half remain external. All that happened was I lost half of my sd card memory and didn't gain any for my internal.

I even tested the device after doing this by pasting a 20 gb file unto my internal storage just to check if it wasn't truly just 16 gb (with only 9.something gb usable by default). The file wasn't pasted entirely, proving that it didn't truly merge the internal and external storage...

 

[puppykickr]

You do not want to make your SD card into internal storage.

First, no card is going to match the speed of the internal memory.
That is just plain physics.

That is not even the worst thing, by far.

The internal memory can handle basically limitless read/write cycles.
Everything you do with a device, there are read/write cycles going on in the internal memory.

The lifespan of an SD card is actually measured in read/write cycles.
So, if used as internal memory, with continuous read/write cycles all the time, you may bring that lifespan down drastically.

That is why SD cards are for storing media.
You write to it, and read from it ever after.

I formatted a 32GB card as internal once.
I was using this device that I am using now, which only has 1GB of RAM.

So, at first it was great. The phone was amazing for only having that 1GB of memory.

I could download and play games that normally would require a device with at least twice the capabilities of this one.

Then one night, in the middle of a game, it suddenly froze.

And not just for a minute.
Or two.

I had to take the battery out and reinstall it to get the phone to reboot.

Once it did, the card was dead.
Dead, dead, dead.

All my music, photos, videos, games, all of it gone.

Most of that I had on other devices, but the loss of the card irked me.

But I did learn my lesson.

I still have the phone, with a different card, that I formatted as external.

I learned how to manage the memory that it has, and it is fine.

But that other card, nothing could read it, and it would not format ever again in any device I put it in.

So the card only lasted about two months.
Does that sound worth it?

 

[ocnbrze]

Hey, I own a Vivo y81i. Has there been any new TWRP releases for this model now? The one on these sites (https://www.stupdroid.com/2018/08/Vivo-Y81-root-twrp.html and https://www.howtoapps.info/how-to-root-vivo-y81/) linked were for Vivo y81 (not for y81i). I've read somewhere that however similar a TWRP you found is to the TWRP you need is doesn't matter and won't work if they're not completely identical... (is that true?)

i agree with @puppykickr about the sd card thing.

as for twrp.....yes twrp is very device specific. if you go to teamwin's website they have a guide in how to compile twrp for your phone.
https://twrp.me/faq/howtocompiletwrp.html

but your phone will need to be rooted in order to use twrp. and i do not think your phone is rootable.

 

[MrJavi]

I also agree with @puppykickr

A custom recovery like TWRP and a .zip might enable adoptable storage. Out of curiosity, I flashed the .zip from the link below to my Samsung and it added a setting to choose adoptable storage.
I personally preferred the old "Link2Sd" and "App2SD" apk root method of partitioning the external SD. It was much more versatile than choosing all internal or all external.

https://forum.xda-developers.com/galaxy-tab-a/how-to/patch-adoptable-storage-enabler-t3507387