Cyberduck is a good server storage file explorer i found on mac. Although Putty is much better than this, but unfortunately Putty is unavailable for mac. It does provide many features like connecting to various types of servers, saving the credentials and sending command line commands to the server which is very helpful for me. It also has an option to preload next level directories and files in the background which makes the browsing experience very very smooth.

I like the simplicity of Cyberduck the best. The user interface is very straightforward for me to connect and transfer files online. We have the capabilities to connect to just about any web server with the multiple field options and information that may be required. We can activate secure connections or open connections. I like being able to see the progress of our transfers when uploading or downloading to or from our web hosting accounts. I like that we can also transfer multiple files at once and get notified when transfers are done.

Safe, easy (once you get the hang of it!), and free!