You can – and should! – back up your website regularly. From the control panel, there should be a Backup function, and with one click, you can save all of your files, if they are under 500 MB. If they total more than that, you will need to save your databases in partitions. To back up your website, is also as simple as through FTP simply dragging your PUBLIC.html folder over to your computer and copying the files in that way. You will not back up your email accounts like that, though. If you have doubts about your web host’s security, you can set up an email forwarder and have everything duplicated in an online email service like gMail or an offline one like Outlook.