You can use the in-built method provided by Microsoft, which is the network upload method. Apart from this, you can go to the second method that is using the software. This is the simple method, which you can try to convert the PST data file to Office 365. The software named as MailsDaddy PST to Office 365 Migration Tool is a perfect solution for this. This software designed with better features as per the needs of the current organization. The tool allows instant migration of PST data file to convert to O 365 account. Provides the preview of data along with all its attachments. Here, you do not require the use of PowerShell. The software can be handled by anyone because it is GUI-based. Its advanced search option helps in looking out the file very easily even if you do not know the location.