Currently, there is no easy way provided by GC for uploading files (html, JS, CSS, etc.,) to the iTach Flex. One has to use 3rd party REST Clients to do this. The need for compressing the files to gzip format, adding a request header etc., complicates the whole process of using a REST Client to do this.
I have mentioned this elsewhere too, and the GC support person has assured me that a tool for the same is on their To-Do list.
I was wondering if the iTach Flex can run an FTP server. This will make it unnecessary for any custom tool. Any standard FTP Client can do the job, for example, Filezilla.