I was able to get rid of the lost and found file.
Lost and Found is a directory. It is owned by root, so it sounds like you were able to delete it because you did so as root.
chown -R 1000:100 /mnt/sdc1
It would be easier to use your username and primary groupname instead of using your uid & gid. Or use the "id" program to display your uid & gid. Post 2 assumed that those where your values. For SuSE, the uid of the first user would be 1000, but for Mandriva or Fedora core, it would be 500.
By the way, what is your uid and default gid. It was assumed in post #2 to be 1000 and 100.
Run "id". And look at the permissions of the mounted directory:
ls -ld /mnt/sdc1
Does it indicate your username and primary group?
Try to create a file there, e.g.: touch /mnt/sdc1/testfile
You could come up with a more descriptive name for the mount point than /mnt/sdc1 if you want.