You should have no issue continuing to use this Transcend SDXC card after downloading from the PC, as long as you do not delete any individual images from the card at any stage. For example, if you like to browse through the photos you took on the camcorder, do not delete any unwanted ones.
Another reason I say this is that some users who offload their SD card to a PC will usually copy the video, but delete the still pictures after copying. For example, if the user uses the camcorder software to offload the video, the software will generally leave the video on the card, but when the user then runs the Windows "Import Pictures" process to offload the images, Windows will ask whether to remove the photos after copying. If this method is done with this Transcend card, the free space fragmentation introduced from the deleted pictures will potentially prevent the card from being able to store any more video until it is reformatted.
So basically my recommendation would be as follows:
- If you don't mind keeping unwanted pictures on the card until it is reformatted, you should not have any issue continuing to fill this card after downloading to a PC all the way until it is filled to capacity.
- If you would like to be able to browse through photos on the camcorder to delete unwanted pictures, I would suggest choosing a different SD card, such as the Silicon Power brand which performed much better with free space fragmentation. The same goes if you would like to delete the still images and keep the video each time you offload to a PC.
Note that deleting the last taken picture is OK, as long as you haven't taken another picture or video after this unwanted photo.
Deleting any video clips should be OK also, as a deleted video clip will leave a much larger block of free space than an image would.