ubuntu - Unable to paste anything in the mounted folder for S3 -

i mounted s3 bucket on ubuntu 14.0, following instructions in s3fs-fuse. can see content of bucket in folder. when try paste in folder, i'm getting permission denied error:

this error when trying upload node multer. trying locally copy/paste fails same error. tried chmod 777 mys3mt/ , input/output error :

on bucket in aws console, i've given read , write permission for both, object access , permissions access. uploaded s3 bucket listed in ubuntu. not able add ubuntu.

what missing? please help.

many thanks.