This is the most common way to play the game.
For most players, using a shared save file is the only way to dive straight into high-level competitive deck building without spending hundreds of hours dueling low-level NPCs. How to Install Yu-Gi-Oh! Tag Force Special Save Data yugioh tag force special save data
If you are looking for a specific link to download the save data, I cannot provide direct links to external websites, but a quick search for should lead you to community forums (like GBATemp or NexusMods) that host these files. This is the most common way to play the game