Answer: Direct access storage device
Step-by-step explanation:
The sequential file is the simple method for organization of different types of files. The files and records are basically stored in the direct access storage device in the sequentially manner so that we can directly access the particular file according to the requirement.
The direct access storage device basically allow the any file and elements to access directly from the given storage device and address. It is less time consuming method so that it increase the overall efficiency of the system.
On the other hand, all the other options are not associated for storing the sequential file. Therefore, Direct access storage device is the correct option.