If you have had a good day of seeing you may want to keep all your data. On other days, you may want to 'filter' out periods of bad seeing. The SST browser tool can be used to do this (please see the Browser manual). Either way, you will still need to transfer data to your own medium.
Please note that, when accessing data directories, because they can contain literally hundreds of thousands of image files, there are certain Unix commands that are best avoided. For example ls can take a long time to complete as can du. One command that is safe and convenient is df -h which can be used to see how much of store1 has been used and how much space is left.
Whether you use the ATABeast or external USB disks, transferring data is the same. If transferring directly from store1 do the following.
ssh store1 -l root
mv -v source destination
For the above command, source will be a directory on store1 (most likely under /data) and destination is your external media (USB disk, ATABeast etc). The -v in the command above stands for 'verbose' and will display progress back to the terminal.
If you which to leave a copy of your data on our disks temporarily, then instead of the mv command, use
cp -rv source destination
Because transferring data can take such a long time, most observers leave it running over night. Should the move not have completed by the start of observations the following day, it is best to use Ctrl-Z to halt the process, as it can interfere with the storage of new data. During periods of bad seeing, the move process can be resumed by typing fg in the terminal.