SFTPDownloadBlockSize property (SFTP Connection Manager)
Specifies the size of a single download request.
Download Block Size
Use this property to control the size of a single download request.
The servers don't limit download request size, however a buffer is allocated to store the requests,
so the larger the value is, the larger memory block is needed.
To automatically adjust block size for optimal performace, use Auto Adjust Transfer Block property.