(e.g., A library website, a file transfer, a Roland device USB drive?)
If you can provide the context or source of the file, I can give you a tailored guide for using, reading, or opening it.
Based on your request, "000950009templibroland5112 mobi" appears to be a specific, likely encrypted or highly specialized identifier, possibly related to a digital library asset, a Roland device, or a specific ebook format file.