@WBYeats,
(1) The company has now transferred all its manual records
onto computer.
The company has transferred all its manual records into computer format. (Computer generically; on one or more computers, of course)
(2) The company has now transferred all its manual records onto
onto the computer.
The company has transferred all its manual records into computer format on one specific computer, either the only computer the company owns, or a specific computer previously mentioned.