I have the Dropbox app on my PC Lenovo Laptop. I wanted to move the contents of an SD card to Dropbox using the computer's SD card reader. I've done previous downloads to the computer hard drive (Photos and Sony Apps) in the past with no issues. As soon as I inserted the SD card into the reader, I received a prompt to download to Dropbox. Excellent! The download worked well with reasonable speed (there were almost 1000 images on the card), but then once finished, I inserted the SD card back into the camera and an Icon appeared saying the card was read only. Apparently something changed the permissions on the card during download process. Is there any way to restore the card to a read/write state through the drop box app on my laptop or did I just nuke an expensive card by allowing it to download directly to Dropbox?