i could not find a way to open it to put it in there
"C:\Users\"Your Username"\AppData" is an hidden folder.
I know two way to open it (Windows 10):
Be careful ! Hidden folders are hidden for a good reason. You can break your PC with a mistake !
1) Change the "Folder options" of your PC to show them
Files > Change Folder and search options > View > Show hidden files, folders, and drives > OK
2) Create a shortcut on your Desktop (That I did)
Right click > New > Shortcut > "C:\Users\"Your Username"\AppData" > "Name of the Shortcut" > Finish
So, you can open the AppData folder
Sorry for my English but it's not my language (I'm French).