Splitting and Merging PST files

Aspose.Email API provides the capability to split a single PST file into multiple PST files of the desired file size. It can also merge multiple PST files into a single PST file. Both the splitting and merging of PSTs operations can be tracked by adding events to these operations.

Try it out!

Merge and combine multiple email files online into a single one with the free Aspose.Email Merger App.

Splitting PST Files

Splitting into Multiple PSTs

The following code snippet shows you how to split a storage file into multiple files:

import os
from aspose.email.storage.pst import PersonalStorage

data_dir = "DataDir_Outlook"
dst_split = os.path.join(data_dir, "Chunks")

# Delete the files if already present
for file in os.listdir(dst_split):
    file_path = os.path.join(dst_split, file)
    if os.path.isfile(file_path):
        os.remove(file_path)

pst_file = os.path.join(data_dir, "pst.pst")

try:
    with PersonalStorage.from_file(pst_file) as personal_storage:
        # Splits into PST chunks with a size of 5MB
        personal_storage.split_into(5000000, dst_split)

except Exception as ex:
    print(str(ex))
    print("This example will only work if you apply a valid Aspose.Email License. "
          "You can purchase a full license or get a 30-day"
          " temporary license from http://www.aspose.com/purchase/default.aspx.")

Splitting by Specific Criterion

The following code snippet shows you how to split a storage file by a specified criterion:

import os
from datetime import datetime
from aspose.email.tools.search import MailQueryBuilder
from aspose.email.storage.pst import PersonalStorage

data_dir = "DataDir_Outlook"
path_to_pst = os.path.join(data_dir, "pathToPst")
pst_file = os.path.join(data_dir, "PersonalStorage_New.pst")

# Define search criteria
builder = MailQueryBuilder()
builder.sent_date.since(datetime(2005, 4, 1))
builder.sent_date.before(datetime(2005, 4, 7))
query = builder.get_query()

# Delete existing PST files if any
if os.path.exists(path_to_pst):
    for file in os.listdir(path_to_pst):
        file_path = os.path.join(path_to_pst, file)
        if os.path.isfile(file_path) and file.endswith(".pst"):
            os.remove(file_path)

# Split Personal Storage into multiple PST files based on criteria
with PersonalStorage.from_file(pst_file) as personal_storage:
    personal_storage.split_into(query, path_to_pst)

Merging PST Files

Merging into a Single PST

The following code snippet shows you how to merge multiple storage files into a single one:

import os
from aspose.email.storage.pst import PersonalStorage

data_dir = "DataDir_Outlook"
sub_pst = os.path.join(data_dir, "Sub.pst")
merge_folder = os.path.join(data_dir, "MergePST")
total_added = 0

try:
    with PersonalStorage.from_file(sub_pst) as personal_storage:
        # Merge with the PST files located in the separate folder.
        personal_storage.merge_with(os.path.join(merge_folder, "*"))
        print("Total messages added:", total_added)

    print("\nPST merged successfully at", sub_pst)
except Exception as ex:
    print(ex)
    print("This example will only work if you apply a valid Aspose Email License. "
          "You can purchase a full license or get a 30-day temporary license "
          "from http://www.aspose.com/purchase/default.aspx.")

Merging Folders from Another PST

The following code snippet shows you how to merge folders from another PST:

from aspose.email.storage.pst import PersonalStorage, StandardIpmFolder

data_dir = "DataDir_Outlook\\"
destination_pst = PersonalStorage.from_file(data_dir + "destination.pst")
source_pst = PersonalStorage.from_file(data_dir + "source.pst")
total_added = 0

try:
    with destination_pst, source_pst:
        destination_folder = destination_pst.root_folder.add_sub_folder("FolderFromAnotherPst")
        source_folder = source_pst.get_predefined_folder(StandardIpmFolder.DELETED_ITEMS)

        # Merge with the folder from another PST.
        destination_folder.merge_with(source_folder)
        print("Total messages added:", total_added)

except Exception as ex:
    print(ex)
    print("This example will only work if you apply a valid Aspose Email License. "
          "You can purchase a full license or get a 30-day temporary license "
          "from http://www.aspose.com/purchase/default.aspx.")