A PST file is personal storage table data of MS Outlook, if you have many PST file and you want to merge PST file in one PST file, try PST Merge tool to easily merge several PST files in single PST files.
there are mutliple outlook solutions to merge outlook pst files, if you have more than 2 files then use this free tool https://www.merge-pst.net/ this tool will help you to join multiple pst file or merge pst files formats
There is no doubt that large PST files slow down the Outlook's Performance. If you have PST file in GB's then unfortunately then, you cannot merge PST files through manual technique. By manual approach, it may take plenty of time or sometimes your data can be damaged. So It would be better if you use some authorised tool like PST Merge Software. It will your PST files of any size in few seconds of time.
Now, one can quickly merge multiple PST file into a single PST file by using PST Merge software. Read more: [url]http://www.pstmerge.filefixutility.com/[/URL]
I would like to suggest another smart utility merge PST files as this utility has topped among all the PST Merge Software in combining PST files in a single go.
There is a number of PST Merge Software available online. You may try the free version PST Merge Software It has all the features of Ideal PST Merger. I have used this software and I found it very helpful and the reliable PST merger.
Moreover, it provides the different options to merge PST files like merge, join PST files and many other.
Multiple tools available to merging outlook pst files, you can use any third party tool. Last time I used merge pst pro from softaken software and found accurate result. You can also try
Search softaken merge pst pro free tool to merge your pst file
Now multiple tools available that merge pst files but few problems with multiple products when i used with my pst files, so finally used this tool http://www.mergepstpro.com/ this tool helped me to merge my 60 files with accurate result.
There is an easy manual trick you can try to merge multiple PST files into a single file. It requires no 3rd party software or any other cost. You just need to use Microsoft Outlook client, that's it. Microsoft Outlook has an Import feature which can help you import data from multiple PST files into a single file.
Visit here:- http://www.datavare.com/software/outlook-pst-merge-expert.html