I am facing this issue since the firts day of usage, i.e., around one month.
The card gets disconnected at least once everyday in smartphone.
I verified this in two smart phones of different brands.
I sent back this card to the dealer who sent it to service center but as this issue doesn’t happen frequently, service center tested this card for around 30 minutes and sent this card back saying it is in good condition.
Now I am afraid to put this card in phone as I am sure due to constant disconnection in an interval of one day, card will be corrupted.
I am highly disappointed with this card and I hope something is done.
Else I will loose my confidence on SanDisk and will refrain from buying anything of this brand as today, data is everything and storage should be reliable.