Answer :
I would say B in terms of security and accessibility preferences. If the user haves a large amount of data that will not be accessed on regular basis, then it's safest to put it on USB.
However if the data is rather important and contains user's creations or anything related to work then it's suggested to do C and D and after that proceed to A. That way it would expand cache query size and be accessed quicker however it would be less safer but still very safe.
However if the data is rather important and contains user's creations or anything related to work then it's suggested to do C and D and after that proceed to A. That way it would expand cache query size and be accessed quicker however it would be less safer but still very safe.