When the capacity of the cloud hard disk is insufficient, which of the following solutions are available? (Multiple Choice)

When the capacity of the cloud hard disk is insufficient, which of the following solutions are available? (Multiple Choice)
A . Set the cloud disk as a shared disk
B . Purchase a new cloud hard disk and mount it to the cloud server
C . Clear the space of the cloud hard drive
D . Expand the original cloud hard disk capacity

Answer: BCD