We have found 3 software records in our database eligible for .nba to .zip file format conversion.
It looks like that NBA files are just renamed ZIP files, so any utility capable of extracting ZIPs can also extract NBA, which is what will more or less achieve nba to zip conversion. You just need to rename the extension from NBA to ZIP so programs automatically recognize it as archive.
Updated: November 7, 2022
One of the oldest and most popular shareware file archiver and data compression utility
NBA
An nba file extension is used for backup archives created with Nero BackItUp program. The Nero *.nba archive files store backup of important data that were selected by user. Nero nba files can be opened and extracted in Nero BackItuUp. However nba files use zip compression file format and can be also extracted by any compression utilities that are able to extract zip archives, just rename file extension nba to zip.
ZIP
Files with zip is associated with the WinZip compression tool. ZIP file is compressed archive container that contains archived files, compressed in ZIP compression format. Common archive format that can be extracted with any archiving tool.