I recently flashed Adnroid 5.0 custom ROM by NamelesROM on my GT-i9300 S3 Samsung. I did backup my ROM by TWRP and the ROM i installed now (NamelessROM android 5.0) worked fine and i am happy with the work. but now i want all my apps and files i had in my previous files into the new ROM that i have now. I don't know how to do that, any help would be greatly appreciated.
There can be multiple solutions for your question. One such is mentioned here in this answer. Quote:
I once extracted single apps and apps data using a normal archiver explorer in my Arch Linux system. In Windows, 7-Zip FM or Winrar should do the trick.
Obviously it is quicker done if you restore the full backup all at once with a custom recovery (but I believe you already merged the archive parts the backup is done in), but I once made a backup after the system launcher went to a systematic crash, so I couldn't do anything, and doing a full restore would led to the very same problematic, so I had to get back the data of the apps I wanted to restore that way.
Just open the
.tarfiles, they are compressed archives.
data.tarcontains what the
datafolder contains in your Internal Storage: upon all the folders,
data/appcontains the apk of the applications you have installed, and
data/datatheir saved data, which is you may want to restore. Inside that folder, every app has its dedicated folder (e.g.,
Google Maps). Copying it in your
data/datafolder in your phone with a root file manager will restore the data for that app.
Again, for a complete restore, just copy the whole packages (supposing you left them untouched) in the directory they were (to find out which it is, do another backup and you will see where it is created), boot into a custom recovery like CWM Recovery and do a full system restore, pointing to where the backup is located in your phone.
Otherwise, you can always do the following:
Take Nandroid backup of new ROM;
Restore Nandroid backup of old ROM;
Restore Nandroid backup of New ROM;
Restore Apps+Data backup in this new ROM by using apps from step 3.
Note that this doesn't concern with your data in Internal/External storage. Nandroid backup possibly didn't took the backup of this data and if your new ROM wiped these storage(s), then you need to look for Data Recovery.
Much more easier now restore a TWRP NANDROID from Titanium Backup (there's a new option there called "Extract from Nandroid Backup" > After that you restore using "only the data" of the apps and not the entire backuped ROM.. It may work on the same version of rom. I don't know if migrating from 5.0 to 6.0 would cause some bugs. But you can try as it works in a app by app basis restore..