Syncing problems and lost files Sketch

Hi there,

I'm sorry to hear this and also apologize for the delay in responding to you. 

Have you tried to follow the steps as mentioned in the thread here: https://community.adobe.com/t5/fresco/bring-your-art-from-sketch-amp-draw-to-fresco-easily/m-p/10618241#M10?

Also, please check if you're able to find your files here: assets.adobe.com.

Regards,

Sheena