First, search the help docs and this forum. Maybe your question has been answered! The debugging steps can help, too. Still stuck? Delete this line and proceed.
What I’m trying to do
I’m not using synchronization.
Suddenly, I lost my laptop so I bought new laptop.
I tried to check the obsidian note on my new laptop, but I couldn’t check the note
Things I have tried
I bought obsidian sync for 10$
But I keep trying to find it, but it doesn’t sync
It sounds like you also didn’t backup the files on your prior laptop? If you weren’t syncing and didn’t backup, then the notes only exist on the lost laptop. If you bought Sync after losing the laptop, it won’t help you get your notes back.