The invention provides a read-only mode mobile storage device. The device comprises a
processing chip, a
data transmission unit, a storage unit and a user
authorization management module, wherein the
processing chip is responsible for controlling command transmission and execution in a whole
system; the
data transmission unit is used for providing an interface for the mobile storage device to communicate with
peripheral equipment; the storage unit is used for storing data; and the user
authorization management module is connected with the
processing chip and used for managing access
modes of files, judging category of a user access data command, permitting the user to read data if the data command is read-only, sending a prompt of needing to input
verification information to the user if the user access data command is non-read data command, permitting the user to perform the non-read data command if
verification passes, and otherwise rejecting the user to perform the operation. By the device, a product owner can perform data reading, deletion, modification and the like, non-product owners can only read the data, and accordingly
data disclosure can be permitted on the basis of guaranteeing file completeness and originality.