how can i show the files that had been saved in cache

how can i show the files that had been saved in cache
i not find any thing in ftp and in file manager

files cached in proxy cannot be accessed. Closest you can get to those files is to look at file-names in /ip proxy cache print.

ok
how can i copy the all files cache to another mikrotik ???

in backup, the cache is backup or only the configuration ???

no, you can’t