After you have setup the your awscli with aws credentials, use the following command to create a bucket in S3 thorugh your terminal:

Create an S3 Bucket

aws s3 mb s3://siddhartha.sandhu

Feel free to replace siddhartha.sandhu with a bucket name of your choice.

Then navigate to the directory where you have the file you want to copy to S3:

aws s3 cp <FILE_NAME> s3://siddhartha.sandhu

To copy the file from s3 to a folder:

1. Go to the folder where you want to copy the file
2. List all buckets in S3:

   aws s3 ls
   

3. Check all the files in S3 in a bucket:

   aws s3 ls s3://siddhartha.sandhu/
   

4. Copy file available in a bucket to your local:

   aws s3 cp s3://siddhartha.sandhu/<FILE_NAME> ./
   

Alternatively, to accomplish above in 1 step when you now the name of the file and the name of the bucket:

aws s3 cp s3://siddhartha.sandhu/<FILE_NAME> /User/siddharthasandhu/<LOCAL_FOLDER>

The above command is for Mac user space. For linux:

aws s3 cp s3://siddhartha.sandhu/<FILE_NAME> /home/siddharthasandhu/<LOCAL_FOLDER>

Copy A Local Folder to S3

aws s3 cp --recursive /home/siddharthasandhu/<LOCAL_FOLDER> s3://siddhartha.sandhu/<FILE_NAME> 

Alternatively,

aws s3 sync /home/siddharthasandhu/<LOCAL_FOLDER> s3://siddhartha.sandhu/<FILE_NAME> 

Copy A S3 Directory to Local

aws s3 cp --recursive s3://siddhartha.sandhu/<FILE_NAME> /home/siddharthasandhu/<LOCAL_FOLDER>

Alternatively,

aws s3 sync s3://siddhartha.sandhu/<FILE_NAME>  /home/siddharthasandhu/<LOCAL_FOLDER>

Here is the S3 Documentation.