i was kinda wondering what are the advantages disadvantages of using either so any help would be much appreciated
Using either? The two does totally different things. Bluetooth adapter will allow you to connect a Bluetooth device to the PC and transmit stuff. For example, you can connect a bluetooth headset to PC, and use it as your wireless headset. You can probably also connect your phone to PC and transfer some small files (though Bluetooth doesn't have much bandwidth) As for card reader, it reads all sorts of flash media (depending on which you have). Plug it into USB port, and it'll act as removable drive like USB pen drives. If you have camera or cell phones it's not a bad way to transfer stuff to yoru PC without connecting a wire. Completely different stuff and different uses. What's the compare?
Bluetooth is used for tranfer the data from one storage device to another (work with limited space).Bluetooth is present in todays mobiles,laptops also external bluetooth device is available.Disadvantage of bluetooth is slow transfer speed of data.There is limitation on distance between bluetooth target device. Card reader is very different than bluetooth.Cardreader is used for to store data Card reader is a storage device which is present in mobiles.Disadvantage of card reader is Storage capacity is limited .
