Before buying any smartwatch do check out their accuracy on this channel....this guy is doing a honest job...
https://youtube.com/@TheQuantifiedScientist
Don't buy products from sites/brands that want us to ship back their faulty products at our own cost even though the products are under warranty.
You could file a complaint in consumer forum and seek full refund plus compensation, but you need a lot of followup and patience.
Use the health tab and error scan tab to see if there is any issue showing up. You need to scan the hdd using error scan tab. Also select proper hdd using the hdd selection drop down menu at the top.
Any sort of filter is better than no filter...even though it won't completely stop the dust from entering, there should be some percentage of dust being blocked by those filters.
Being an electronic junkie i can say that this is one of the best sets i have come across...after so many years of wear and tear there is no rusty parts nor the sharpness of the drive bits has been affected. Will recommend it to any hobbyist who wants a durable and quality set. Price mentioned...