That is the remaining time until a new file is started. You can check this by changing your setting (say from 24/48 t0 16/44.1) and the remaining time will change as you will have more storage capacity at one setting versus the other within the 2gb limit. There is no way to change the file size, as that is not a tascam issue but a FAT32 allocation issue. I forget the details, but this is why most decks have 2gb file limits. I know the some are 4gb like the Marantz pmd661, and the Fostex FR2LE, but I do not know what is different on those decks. Perhaps someone with more remaining memory capacity than I can elaborate...