How to Recover Lost data on Internal Memory

Sad day for me, I copied some images to my phone from PC. When opened my gallery, not a single image could be seen. Everything wiped out suddenly. There were tons of photos (No backup).

My Moto G (1st Gen) is not even rooted, which makes it even more difficult to recover data.

Is there any way I can recover Lost/deleted data from Internal Memory?

Please someone help! I am in real trouble.

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