ZIP archive for Toshiba Satellite E45T and S40T notebooks referencing CA10SU and CA10CU, which appear to be the board or project codes. At only 147 KB the name does not reveal whether it contains a boardview, BIOS or other data, so open it and inspect the contents before use. For layout files, a viewer like OpenBoardView helps locate parts and test points; for firmware, back up the original flash chip first. Match the code printed on your board against CA10SU or CA10CU.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @boardviews. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip