1) To upload an unlimited number of videos from this camera to the cloud, I recommend purchasing a GoPro subscription. It costs 50 euros a year, but it's worth it. 2) To prevent hiccups when recording and using at high resolutions, I recommend taking fast cards, such as Lexar Professional 1066x microSDXC or Transcend microSDXC 340S 128/256Gb, which have read/write speeds of 160/120Mb/s. 3) extra batteries in quantity "X" at your discretion, but at least 2-3; for instance, it's practical to bring a charger for three batteries right now. 4) ND filters from JSR June Star (more expensive) and Telesin (cheaper) can be used in place of a removable lens, which is useful if you use a gopro in any box. Additionally, this pr-tel features a macro lens x15 similar to a modlens that has a close focus range of 15 to 20 cm. 5) The best ND filters are Polar Pro and Wreewell, which cost respectively $80 and $65; nevertheless, Freewell offers two polarization-enhanced lens kinds, ND and ND-PL. 6) A new anamorphic lens (from KASE or SKYREAT) for the GoPro 9 and 10 has been released. 7) To install the beta firmware on the camera, visit the official website and click Help -> Help Center -> HERO10 BETA FIRMWARE install (there is now no beta version available).