problem with pictures named in hebrew when transfering a site

hello dedicated staff!

I have a question about transferring sites.

I have 2 different hostgator hosting accounts. sometimes I duplicate a site for testing purposes.

On the original site, ususally pictures are named in Hebrew, however, when I supplicate the site and upload it on the other hosting account, somewhere in the process the Hebrew characters change to symbols and the pictures don't display.

to make the transfer I zip all folders and upload the zipped file and exctract.

I tried to rename the pictures from the cpannel, but it doesn't allow me to change it.

What can I do? and why this happens?

Thanks!