What is the difference between OST and PST?

Microsoft Outlook is a particular feature in Microsoft Office suite which helps in the management of personal information. It can also be used for other things like note taking, and it has a calendar, contact manager, and journal. However, OST and PST are two ways of saving files on Microsoft Outlook, and they equally come with their differences.

OST has its folder where you can store files that you would still be able to read and use when you are offline. In other words, offline materials are stored in OST file folder. This provides you the opportunity to make use of OST files in areas with a low internet connection. On the other hand, PST files are personal files which are stored in a separate folder. Although it may be used with Microsoft exchange server, it is not always advised. Every information you store in PST file folder are directly going into your hard disk and not necessarily into the Microsoft exchange server.