On File R-01 you will come across a section with a Ferris wheel, as you walk up to the Ferris wheel for the 1st time, directly to the left, in the corner of the map, will be a blue box you can break open with blade mode. It has 5,000 BP. Once you break it open & get the 5,000 BP. Call Courtney, save the game, then go restart. You'll end up in front of the Ferris wheel & able to run over to the BP stash & collect another 5,000 BP. You can repeat this process however many times you want.