I have a device like this and it supports heavy gpu inside my pc. Wery usefull and nicly built thing made from metal. But the consern is it has a magnet on botom side, so it sticks to metal surfece inside the case. Wery usefull again but my hard disk is under that metal surfice. So i wonder can it corupt data or damage hdd itself…?!
Yes magnets can affect HDDs. But it needs to be very strong and close to the HDD. I wouldn’t worry unless you are directly attaching it to you HDD and even then it probably won’t do much if anything at all.
Remember HDDs already have strong permanent magnets inside them. Probably way stronger then the one on the bottom of that support.