WorkDocs Migration

I understand you're encountering issues while migrating your data from Amazon WorkDocs to S3 as part of the preparation for WorkDocs' end-of-life. The error you're experiencing with Windows being unable to open the downloaded zip files is concerning, but there are a few things to consider and potential solutions to try:

1. File size limitations: The WorkDocs Data Migration Tool creates zip files that are at most 50 GB in size. If a user has more than 50 GB of data, multiple zip files will be created. Ensure you're not trying to open a zip file larger than what your system can handle.

2. Incomplete downloads: Make sure the zip files have been completely and successfully downloaded from S3. Partial or corrupted downloads could lead to the error you're seeing.

3. S3 download method: Instead of downloading directly from the S3 console, you might want to try using the AWS CLI or an S3-compatible tool to ensure a complete and uncorrupted download.

4. Alternative extraction tools: If Windows' built-in zip functionality is failing, try using third-party archiving tools that might be more robust in handling large or potentially corrupted zip files.

5. Check for skipped files: The migration tool creates a CSV file listing any files larger than 50 GB that weren't included in the zip files. Make sure to check this list to ensure you're not missing any critical data.

6. Consider EC2 for large sites: For very large WorkDocs sites, it's recommended to use an EC2 instance to programmatically download and upload data to another storage solution. This might help bypass some of the issues you're encountering with direct downloads.

If these steps don't resolve the issue, you may want to consider re-running the migration process or contacting AWS support for further assistance. Remember, it's crucial to verify the integrity and completeness of your migrated data before the WorkDocs end-of-life date.
Sources
Migrating data out of Amazon WorkDocs - Amazon WorkDocs
How to Migrate Content from Amazon WorkDocs | Business Productivity