The phrase you're looking at appears to be a mix of Slovak and likely a poorly translated or technical instruction related to a or file-sharing task. Súbor : This is the Slovak word for "File."

Are you trying to after downloading it, or are you having trouble with a specific file-sharing program ?

: This is a technical term used in peer-to-peer (P2P) file sharing, like BitTorrent. Large files are broken into smaller "pieces" to make them easier to share across a network. "Making a piece" usually refers to the software verifying, hashing, or preparing a specific segment of the file for upload or download.