Hi, I've recently started getting into Photography and have bought my first camera and a 64GB SD card along with it. I want to start deleting some of the test photos I took, so I put the SD card into my laptops card reader, however it says the card is in read-only mode and I cannot delete items. Now, the SD is definitely unlocked, I've even tried sellotaping the lock switch so it doesn't get changed when it is inserted, but that does nothing. Other SD cards work fine in the card reader and also this SD card works fine in my friends laptop, so it seems as though my laptop just doesn't want to play with my SD card. I know I can connect the camera to the laptop and delete things that way or just delete them on the camera, but I like to be able to just take the SD card out and plug it in, you know? What I am using; SD: SDXC 64GB Digi-chip Speed-Pro Laptop: HP Envy 15 Notebook, running Windows 10 Camera: Nikon D3300 Any help would be appreciated, but like I have said it's not an issue with the card or the card reader themselves, just a compatibility issue.