Disclosed are computer implemented methods, computer program products, and computer systems for storing a file into a storage system. An embodiment includes, responsive to a determination that a descriptive information describing content of a first file corresponds to a descriptive information describing content of a second file, that a format of the first file is convertible to a format of the second file using a transformation matrix, and that the format of the first file has a higher quality indicator value than the format of the second file, storing the first file into the storage system.