A computer-implemented method of storing an item of data across a plurality of storage media, the method comprising the steps of: receiving an item of data to be stored; splitting the item of data into N pieces of data; generating M redundancy pieces of data, usable to rebuild the item of data; storing each of the N pieces of data and M redundancy pieces of data on separate storage media of the plurality of storage media at a same offset within a file of the respective storage medium, the files of the storage media containing the N pieces of data and the M redundancy pieces of data being associated as a file set; and storing, separately to the N pieces of data and M redundancy pieces of data, the offset and the file set.