Plz help me recovery important photo :(

[Nobyta]

This is the first time i use PC Companion and Xperia U St25i, i get confused between File Manager and Xperia Transfer, i clicked Xperia Transfer -> Start. After that, i lost all my important photo, but contact, app are still on my phone.
I tried using some software to recovery like android data recovery, Wondershare Dr.Fone for Android, Recuva, but all software don't work with Media Transfer Protocol, i can't find USB Mass Storage on my phone.
How can i recovery my photo or connect my phone with USB Mass Storage without Root? Will Root phone erase all contact, app?
Please give me an advice soon.
Thanks so much.

[Uliwooly · Accepted solution]

I'm sorry to say this but you won't be able to recover pictures stored on the internal storage, you could go to 

Internal storgage > DCIM > thumbnails > and look for the picture there

[Uliwooly]

For future reference, I would suggest that you backup your pictures and videos periodically with perhaps Google plus