An SPBM file is essentially a compressed container—similar to a ZIP or TAR archive—that holds multiple data types from your phone, including:
The file is a proprietary backup format created by Samsung Smart Switch . Because these files are often encrypted or compressed in a unique way, they cannot be converted directly to VCF (vCard) using standard online conversion tools . spbm file to vcf link
The most reliable way to access your contacts is to restore them to a Samsung device first, then export them in a standard format. The Ultimate Guide: How to Convert an SPBM
If you manage to convert the backup to a CSV file (common with older SPB files), you can then use free online tools like the CoolUtils CSV to VCF Converter CloudConvert to finalize the transition to vCard format. Coolutils Converter How to open SPBM file (and what it is) - File.org If you manage to convert the backup to