Yes, you can split an Outlook PST file by year or by folder either manually or by using GainTools Split PST Software
Manual Method
Outlook allows you to manually transfer emails into new PST files. Emails from the main PST can be dragged to the appropriate year PST by creating a PST file for each year. Emails can be divided by folder by creating distinct PST files for Inbox Sent Items or other folders, then transferring the emails into them. This approach is free, but if the PST file is big, it can take a long time and be at risk of mistakes.
Professional Method
GainTools Split PST Software You can instantly split PST files without losing any data with this software. You have the option to divide by year, resulting in distinct PST files containing emails from each year. Additionally, you can divide by folder so that every Outlook folder for example, Contacts or Inbox Sent Items is saved as an own PST file. Working with both ANSI and Unicode PST files, the application preserves all email attributes and keeps the original folder structure. It is safer and quicker than doing it by mutually beneficial ways, especially when dealing with big PST files.
Manual Method
Outlook allows you to manually transfer emails into new PST files. Emails from the main PST can be dragged to the appropriate year PST by creating a PST file for each year. Emails can be divided by folder by creating distinct PST files for Inbox Sent Items or other folders, then transferring the emails into them. This approach is free, but if the PST file is big, it can take a long time and be at risk of mistakes.
Professional Method
GainTools Split PST Software You can instantly split PST files without losing any data with this software. You have the option to divide by year, resulting in distinct PST files containing emails from each year. Additionally, you can divide by folder so that every Outlook folder for example, Contacts or Inbox Sent Items is saved as an own PST file. Working with both ANSI and Unicode PST files, the application preserves all email attributes and keeps the original folder structure. It is safer and quicker than doing it by mutually beneficial ways, especially when dealing with big PST files.