Instead of searching for "SUPER MARIO MAKER 2 -NSP--Update 3.0.2-.rar," consider the following official channels:
Be aware that using NSP files often requires a modified (homebrew) Nintendo Switch console and may carry a risk of being banned from online services. Refer to the Nintendo Switch Support page for official update methods. SUPER MARIO MAKER 2 -NSP--Update 3.0.2-.rar