Zipped archive for the Samsung SM-J260G, the model code of the Galaxy J2 Core, weighing 3.89 MB. The name gives only the model number, so the exact contents are not stated; packages like this for Samsung phones usually hold service schematics or board layout pages used to trace power lines, charging circuits and display connectors. Extract it and confirm the documents match the J260G variant, since Samsung regional suffixes can differ in board layout, before probing test points or replacing components on the PCB.
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 @Schematics_Mobile. Enginerys does not host this file.
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Compressed archive that every operating system opens without extra software.