Usage patterns
〈物〉の容量が大きい/小さいthe capacity of ~ is large/small
This hard disk has a large capacity.
容量を超えるto exceed the capacity
The file size exceeded the storage capacity.
容量がいっぱいになるfor the capacity to become full
My phone's storage became full.
容量を増やすto increase the capacity
I increased the memory capacity.