I only use ES File Manager for file management (ie. Explorer), I don't even know if it can do syncing functions.
Depending on the amount of pictures you have, you could use DropBox or Google Drive, maintain them in the cloud and just sync to a local directory on your PC.
Also, I think HTC has a tool specifically for syncing files between the handset and desktop PC, but I have never used it. HTC has it for download and with instructions on this page:
HTC Rezound