1. A data storage device, comprising: a persistent storage; a deletion buffer to store a pointer to a block of data; and a controller configured to receive a secure delete command to securely delete data of a file, wherein the secure delete command causes the data to be deleted to be overwritten two or more times, identify a data block of the file to securely delete, store a pointer to the data block in the deletion buffer, the pointer including an address of the data block in the persistent storage, determine whether the secure delete command has a highest priority over other data storage device commands, perform the secure delete command to the data block in response to the secure delete command having the highest priority, pause the secure delete command in response to the secure delete command not having the highest priority, determine whether the deletion buffer is full; and perform the secure delete command to the data block in response to determining the deletion buffer is full.