Just in case, you would need to chown the mount point where the partition is mounted and not the partition itself (in this case /dev/sde1). For example if you mount /dev/sde1 at /Data:
sudo chown -R $USER:$USER /Data
Just in case, you would need to chown the mount point where the partition is mounted and not the partition itself (in this case /dev/sde1). For example if you mount /dev/sde1 at /Data:
sudo chown -R $USER:$USER /Data