I had a working version of Ubuntu on my hp stream 13, and in my own stupidity I tried to repair the windows installation from EFI file and a recovery disk. I stopped before it advanced a lot, but now I have a partition with all my data which I cannot use because it says "basic data partition" and content "unknown".
I hoped I can reboot the system in that HD partition but the grub repair answers I found did not work. Is there any way I can recover the data stored there? I tried already several programs which did nothing like reinstalling grub, testdisk, gdisk...
I learnt the lesson. Do not touch OS before saving important data.
I hope you can help. Thanks!