Can files be transferred from one S3 account to another without an intermediary step?

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Yes, files can be transferred from one S3 account to another without an intermediary step.

This can be done by using the AWS Command Line Interface (CLI) or by using third-party tools such as BucketSync or Cloudberry Explorer.

To transfer files using the CLI, you will need to have access credentials to both S3 accounts. You can then use the AWS CLI copy command to transfer files from one account to another.

For example, the following command can be used to transfer a file from one bucket to another:

aws s3 cp s3://source-bucket/key s3://destination-bucket/

Where "source-bucket" and "destination-bucket" are the names of the buckets in the source and destination S3 accounts respectively, and "key" is the name of the file being transferred.

It is important to note that there may be costs associated with transferring data between S3 accounts, depending on the amount of data transferred and the regions where the S3 accounts are located.