Devices for converting data are provided. In one embodiment, a data conversion device is provided that includes a conversion portion and an existing file segment database portion. The conversion portion is configured to partition a file to be converted into a plurality of file segments. The existing file segment database portion is connected to the conversion portion. Also, the existing file segment database portion is configured to store one or more existing file segments and one or more key values, each of the one or more key values associated with one of the one or more existing file segments. The conversion portion is also configured to assign a key value to each of the plurality of file segments and to create a key value file with the assigned key values.