Let's dissect what each part of this search term actually means for the end-user.
True 1080p requires a lot of pixels. Many "800MB Bluray" rips are actually 720p or even 576p upscaled. Check the metadata: harry+potter+bluray+800mb+collections+all+parts18+bdrip
If you love the idea of a small collection but hate pixelation, consider these "Goldilocks" sizes instead of the extreme 800MB: Let's dissect what each part of this search
Pro Tip: If you have a 1TB external hard drive ($50), you can store all 8 movies at 10GB each (1080p Remux quality) for 80GB total. The "800MB" collection is only useful if you are extreme space-saving (e.g., a 32GB tablet with 50 other movies). The "Phone/Tab" 720p Rip: 1
Assuming you have legally obtained the file (by ripping your own Blu-rays), here is how to play them without stuttering:
Hardware Requirements:
Software Recommendations: