Unable to create non-default file share in FSx

HI, Thank you for writing to us.

The error which you have encountered may occur when the SYSTEM user does not have Full control NTFS ACL permissions on every folder on which you create an SMB file share.

As per [1], Amazon FSx requires that the SYSTEM user has Full control NTFS ACL permissions on every folder on which you create an SMB file share. Do not change the NTFS ACL permissions for this user on your folders, as doing so can make your file shares inaccessible.

Hence please confirm the permissions of SYSTEM user and check if issue resolves.

If issue persists, then please consider to open a support case with us to check the details further and help you accordingly.

[1] https://docs.aws.amazon.com/fsx/latest/WindowsGuide/managing-file-shares.html