.sys-reserved-rw-bitmap.grow is Pioneer DVD Recorder Dummy File
Key Features: .SYS-RESERVED-RW-BITMAP.GROW File Extension
What is an .SYS-RESERVED-RW-BITMAP.GROW file?
A SYS-RESERVED-RW-BITMAP.GROW file is a dummy file created by Pioneer DVD Recorder. It stores Space Bitmap information that describes partition size on a DVD-RW disc, which is used to decrease the time elapsed when scanning for free space on a DVD-RW disc.
A user will most likely only find a SYS-RESERVED-RW-BITMAP.GROW file when opening a DVD-RW disc created by Pioneer DVD Recorder. The file is accompanied by a "DVD_RTAV" folder, which stores an .IFO and .VRO file. SYS-RESERVED-RW-BITMAP.GROW files are not meant to be opened.