When you try to export PST Contacts to vCard in bulk, you often face slow speed because your PST file is large and contains heavy contact data. And your system performance also affects the speed because low RAM or CPU can make your process lag. But sometimes your PST file can be slightly corrupted, so the tool takes more time to read and convert data. Also, manual methods are slow because they convert one contact at a time, and this increases the workload and delays the task. And even online tools can create problems because they depend on internet speed and have file size limits. So your time gets wasted, and you feel confused. So you should use OSTtoPSTAPP PST to VCF Converter because it smoothly handles bulk contacts and gives stable performance. And it saves your time with simple steps and better results. You can also try its free demo version to check how it works before using the full version.