Sync your home directory:
aws s3 sync $HOME s3://homeof$USER
E.g. $USER is sil and $HOME is /home/sil, then this will copy all files from /home/sil to bucket homeofsil.
To download the files back to another directory:
mkdir $HOME/oldhome aws s3 sync s3://homeof$USER $HOME/oldhome
More details about S3 Sync in the official documentation.