Permission errors when uploading plugin templates

[KevinGrand]

Step 3 of the Plugin example guide makes it clear that you can upload template files for plugins in the plugins/PLUGIN-NAME-HERE/dev/html folder. Every time I try to upload to that folder I get "permission denied". Trying to change the permissions of the folder prompts the message "550 CHMOD 775 html: Operation not permitted".

Any ideas? Thanks