The size of the files always remains in the center of the process. So, the concern about the size of the OST files and PST files is obvious. As we know, the maximum recommended size for Non-Unicode PST file and OST file is 2 GB in all Outlook versions, and the maximum recommended size for Unicode PST file and OST file varies according to Outlook versions
But sometimes, due to ignorance of oversized OST and PST files, the working process gets inversely affected, and the file may get corrupted. At that time, by going through this way, the user can get rid of this.
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Free DownloadAs default size for the PST files and OST files is limited, and users wish to maximize the size. It can be done by the Registry value, which allows to maximize the size up to approx. 4PB (4096 TB) depends on Outlook Version. But the main question is...
Via Registry, the size of files gets modified; increase, or decrease. But this method doesn’t apply to the Outlook 97-2002 versions' OST and PST files. Hence, PST files of ANSI format.
For the increase in the maximum size of Outlook PST and OST files, the user has to create and set 2 values in the given location in the Registry:
NOTE:The steps given below; applies to both PST and OST files.
For the successful implementation of the process; create or set the given DWORD values for Non-Unicode PST/OST files:
To execute the process successfully; create or set the following 2new DWORD values for UNICODE PST/OST files
The first value (WarnLargeFileSize) indicates that before getting the warning of the full file, how many MB a user can write to a PST file or OST file.
It gets noticed that for the best practice and genuine working, the difference between Warn Large File Size and Max Large File Size should be at least 5%. In case due to the oversize of files, if the corruption of PST files takes place, this is how you can repair and recover the corrupted PST files.
In the above example, the maximum size of PST files and OST files has been set to 105 GB with the warning at 98 GB.
For the increase in the maximum size of Outlook PST files and OST files, the user has to create and set 2 values in the given location in the Registry:
For a better understanding of configurations of Outlook versions; see the details given below:
| Name | Type | Valid Data Range | Default |
|---|---|---|---|
| MaxFileSize | REG_DWORD | 0×0004B000 – 0×80000000 (in Bytes) | 0×7BB04400 (2,075,149,312 Bytes) (1.933 GB) |
| WarnFileSize | REG_DWORD | 0×00042400 –0×7C004400 (in Bytes) | 0×74404400 (1,950,368,768 Bytes) (1.816 GB) |
| MaxLargeFileSize | REG_DWORD | 0×00002048 - 0xFFFFFFFE (in MB) | 0×0000C800 (51,200 MB) (50 GB) |
| WarnLargeFileSize | REG_DWORD | 0×00001EAA - 0xF3333331 (in MB) | 0×0000BE00 (48,640 MB) (47.5 GB) |
| Name | Type | Valid Data Range | Default |
|---|---|---|---|
| MaxFileSize | REG_DWORD | 0×0004B000 – 0×80000000 (in Bytes) | 0×7BB04400 (2,075,149,312 Bytes) (1.933 GB) |
| WarnFileSize | REG_DWORD | 0×00042400 –0×7C004400 (in Bytes) | 0×74404400 (1,950,368,768 Bytes) (1.816 GB) |
| MaxLargeFileSize | REG_DWORD | 0×00002048 - 0x00019000 (in MB) | 0×00005000 (20,480 MB) (20 GB) |
| WarnLargeFileSize | REG_DWORD | 0×00001EAA - 0x00017C00 (in MB) | 0×00004C00 (19,456 MB) (19GB) |
For the increase in the maximum size for PST and OST, the above-described method is the best way. But if your focus concern is over-sized files which can inversely affect working or may lead to corruption, you also have the option to split or compress PST. Using Professionals way, users can split PST files as per their need, compress PST files, and reduce their size without any concern to get rid of oversized PST. Shoviv PST Management Suite is a multipurpose all-in-one software for PST that expertly handles all the tasks of PST. Download it and try its free trial/demo version to ensure the tool's working.
