1. A method for recording digital data comprising the steps of: evaluating a quality of a flag in input data indicating a status of error correction in said input data; when the quality of said flag is such that any error in said input data can be corrected upon reproduction, storing the data directly in a first memory; when the quality of said flag is such that errors in said input data cannot be corrected upon reproduction, storing other data in place of said input data which will cause no erroneous operation upon reproduction; and recording the stored data on a magnetic tape.