An 88.1 KB PDF labelled 24C01 with a _3 suffix, probably a third copy of a datasheet for this 1 Kbit (128-byte) serial EEPROM. The name says nothing about a maker, device or board. Inside you can expect pin descriptions, I2C protocol details, electrical ratings and write timing. Such a reference is useful when reading a small configuration memory in consumer or industrial electronics. Confirm the package marking against the document and save a backup of the contents before writing.
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 @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.