How can you upload Salesforce Attachments to the AWS FTP Server?
Here’s the step by step process of how you can upload the Salesforce Attachments to AWS:
STEP 1: Create a bucket in S3 instance of AWS Console
STEP 2: Create new access key and access secret key
STEP 3: Develop a Batch at the Salesforce side
Conclusion:

How can you upload Salesforce Attachments to the AWS FTP Server?

Uploading your important documents to the AWS FTP server sometimes becomes very important if you need to share the attachments with the third party or create a backup.

Here’s the step by step process of how you can upload the Salesforce Attachments to AWS:

STEP 1: Create a bucket in S3 instance of AWS Console

The bucket name must:

Be unique across all of Amazon S3,
Be between 3 and 63 characters long,
Not contain any uppercase characters,
Start with a lowercase letter or number.

Note:

After you create the bucket, you can’t change its name. For more information on naming the buckets, see Rules for bucket naming in the Amazon Simple Storage Service Developer Guide.

4. In the Region, choose the AWS Region where you want the bucket to reside.

5. In the Bucket Settings for Block Public Access, choose the Block Public Access settings that you want to apply to the bucket.

I recommend you to leave all the settings enabled unless you know you need to turn one or more of them off for your use case, such as to host a public website. Block Public Access setting that you enable for the bucket should be enabled for all the access points that you create on the bucket.

For more information on blocking public access, see Using Amazon S3 Block Public Access in the Amazon Simple Storage Service Developer Guide.

6. (Optional) If you want to enable S3 Object Lock:

7. Choose Create bucket.

1.Sign into the AWS Management Console and open the Amazon S3 console at Click here

2. Choose Create bucket.

3. In the Bucket Name, enter a DNS-compliant name for your bucket.

STEP 2: Create new access key and access secret key

1.Create a new access key, which includes a new secret access key.

2. To create a new secret access key for your root account, use the security credentials page. Expand the Access Keys section, and then click Create New Root Key.

3. To create a new secret access key for an IAM user, open the IAM console. Click Users in the Details pane, click the appropriate IAM user, and then click Create Access Key on the Security Credentials tab.

Note: If you already have the maximum of two access keys—active or inactive—you must delete one first before proceeding. If you need more than two root access keys, IAM users (each of whom can be assigned their own access keys) would probably better suit your requirements.

4. Download the newly created credentials, when prompted in the key creation wizard.