Caching means CuteFTP stores the site list information on your computer, so when you navigate to different files and folders, you don't have to reconnect.
To specify cache options
Display the Site Manager and view the Site Properties.
Click the Actions tab.
In the For navigation use the following caching options box, click one of the following:
Use cache during session - Store the site's information only until you close the connection (the default setting).
Always use cache - Store the site's information and keep it even after you disconnect.
Do not use cache - Never store the site's information.
Click Connect or OK .