android improve internal storage

Question

is it possible to use an sd card as part of a smartphone's internal storage, even rooting the phone?

I have read that google has been on that feature since android M, but what about versions like kitkat?

thank you in advance for any help.

for testing I am using a vodafone smart first 6. but the device belonging to the person who requested this from me is a selectline, some model I may not remember, but runs kitkat 4.4.2, and has 4gb of internal storage divided in partitions of 2 each, as I understood, and is using an sd card of 16gb. — prosa, Jun 13 '16 at 13:37

score 1 · Accepted Answer · answered Jun 13 '16 at 11:48

1

You need to change the layout of the device

You need to build a specific rom and a specific recovery to adopt the sdcard

What do the specific rom and specific recovery means ?

Let me start by how android manages storage

As per kitakat the storage is determined by the fstab and the storage-list.xml

This define what blocks should be used for what purpose more specifically they determine the partition

To adopt the storage

You need to build a new rom with modified fstab and
storage-list.xml (till lollipop because android 6 uses only the
fstab)
Then build twrp (or any other recovery) with modified fstab and
storage-list.xml
Then flash twrp and wipe everything using advanced wipe a word of
caution this will wipe your sdcard

Enjoy

answered Jun 13 '16 at 11:48

DevUt

@pemq you can see HTC one x 's xda forum new layout that will give you more idea – DevUt Jun 14 '16 at 04:59
@pemq do your phone has a external sdcard or a inbuild one? – DevUt Jun 14 '16 at 12:39
external, but it has a built-in slot – prosa Jun 14 '16 at 15:20
@pemq you mean you have a sdcard ? – DevUt Jun 14 '16 at 15:23
yes, that is it – prosa Jun 14 '16 at 17:12
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1 Answers1