First - it may be helpful to read the Parameter Guide's section on the Network tab. It includes this information on the first page:
"Mac OS X supports FTP volumes as read‐only disks within the Finder. For full read and write support, a third‐party FTP client application is required; a variety of free and paid applications are available."
Personally, I use Transmit, which is a commercial program.
The free and open-source Cyberduck also gets extremely good reviews, and it's quite easy to use. It's available for both MacOS and Windows. I've written a first draft of instructions for its use; let me know if these work well for you.
To set up ftp with the KRONOS and Cyberduck:
* ON THE KRONOS
1. Go to the Global Network page.
2. In the TCP/IP section, make sure that the following settings still have their default values:
Hostname = kronos
Address Method = DHCP
If necessary, press the "Configure" button and change them back to these default settings.
3. In the FTP section, set the Username and Password as desired.
* ON YOUR COMPUTER
1. Download the software from here:
http://cyberduck.ch/
2. Install the software:
2a. On the Mac, drag the software into your Applications folder.
2b. On Windows, use the wizard to install the software. Enable the "Install Bonjour" option; this provides support for zero-configuration networking.
3. Start the software.
4. In the window that appears, click on the plus button (" + ") in the lower-left-hand corner of the screen.
This brings up a window to add a bookmark. In this window:
5. Set the Nickname to KRONOS.
6. Set the Server to "kronos.local" (without the quotes).
7. Enter the Username you created in step 3 under "ON THE KRONOS," above.
8. Close the window.
9. Double-click on the new KRONOS icon in the main window.
A dialog will appear, asking for your password.
10. Enter the Password you created in step 3 under "ON THE KRONOS," above.
A window will appear, showing one or two SSDs, depending on how many you have installed in your KRONOS.
11. Double-click an SSD to open it in Cyberduck.
You can now use Cyberduck to transfer files between the KRONOS and your computer. You can also use ftp to create folders and move and rename files on the KRONOS.