Methods of taking backup

There are many methods to take backup of your data. Most of the data is either saved in encrypted form or in compressed form. Some of the mediums on which data is stored are:

• CDs (obsolete now)
• Compact Flash
  
• DVDs
• Flash Memory
  
• Floppy drives (obsolete now)
• Hard Disks
  
• Magnetic Tapes
• Memory Sticks
  
• Pen Drives
• RAID
• Secure Digital Cards
  
• SmartMedia
• Thumb Drives
  

We will be having a look into the above mentioned devices and how can these be used to safeguard our data.