What type and size Media Card can I use in my device?

From BlackBerryFAQ

The BlackBerry devices that have media card capabilities are from the 81xx, 83xx and 88xx series.

All of these series use a MicroSD card and have the following maximum capacities:

• BlackBerry Device Software 4.2.0
  • Up to 2GB
• BlackBerry Device Software 4.2.1
  • Up to 4GB
• BlackBerry Device Software 4.2.2
  • Up to 4GB
• BlackBerry Device Software 4.3.0
  • Up to and above 8GB
• BlackBerry Device Software 4.5.0
  • Up to AND above 8GB

See details here: http://www.blackberry.com/btsc/articles/69/KB05461_f.SAL_Public.html