Relocation to a new PC

Chris_Hill1 · October 16, 2025, 5:37pm

I am currently running eM Client on an older PC under Win 10 and which cannot be updated to Win 11 so i will need to acquire a new PC and transfer the email and calender data.

Currently, I have 4 active email accounts and a single ‘Local Folders’ folder. The majority of my email is through my Gmail account which dates back some 14 years. I also have both Outlook/Hotmail and BT Internet accounts, which I rarely use, and a UK .gov.uk account for my local parish, of which I am a councillor.

The Local Folders structure contains some of my email history prior to 2019 and is split into multiple sub-folders based on their nature. This will include data from my Gmail account as well as from my old Outlook .PST files and refering to older email accounts. I have just copied my Gmail Inbox and Sent folders for the period beofre 2022 into the Local Folders and am now merging that into the various sub-folders. When that is complete I will remove them from my mail account.

Looking at my PC I can see the following file structure:

E:\Users\Chris\AppData\Roaming\eM Client>dir . /s /on
Volume in drive E is 2TB 1
Volume Serial Number is B63A-B1CB

Directory of E:\Users\Chris\AppData\Roaming\eM Client

01/03/2018 11:36 .
01/03/2018 11:36 ..
20/01/2018 15:12 24f64724-4b5e-4893-a708-b1f2d1f05c7b
20/01/2018 20:57 28,672 accounts.dat
01/03/2018 11:36 Archive
01/03/2018 11:36 28,672 categories.dat
01/03/2018 11:36 40,960 certificates.dat
01/03/2018 11:36 Local Folders
01/01/2025 13:19 Logs
20/01/2018 15:09 4,096 main.dat
01/03/2018 11:36 12,288 rules.dat
01/03/2018 11:36 Search Folders
01/03/2018 11:36 40,960 settings.dat
27/02/2018 17:13 40,960 settings.dat-bak
01/03/2018 11:36 20,480 snippets.dat
01/03/2018 11:36 20,480 templates.dat
01/03/2018 11:36 12,288 widgets.dat
10 File(s) 249,856 bytes

Directory of E:\Users\Chris\AppData\Roaming\eM Client\24f64724-4b5e-4893-a708-b1f2d1f05c7b

20/01/2018 15:12 .
20/01/2018 15:12 ..
01/03/2018 11:36 33620deb-1d2d-4b6f-a8e0-66f4e28f8710
01/03/2018 11:36 a021e17b-5cb9-4aff-8806-feb77cd5959d
01/03/2018 11:36 a883afd0-da7f-4672-86a9-a137c6272739
01/03/2018 11:36 d678e7bd-ee24-4c94-9cce-0c5e1bf8275f
0 File(s) 0 bytes

Directory of E:\Users\Chris\AppData\Roaming\eM Client\24f64724-4b5e-4893-a708-b1f2d1f05c7b\33620deb-1d2d-4b6f-a8e0-66f4e28f8710

01/03/2018 11:36 .
01/03/2018 11:36 ..
01/03/2018 11:36 32,768 folders.dat
1 File(s) 32,768 bytes

Directory of E:\Users\Chris\AppData\Roaming\eM Client\24f64724-4b5e-4893-a708-b1f2d1f05c7b\a021e17b-5cb9-4aff-8806-feb77cd5959d

01/03/2018 11:36 .
01/03/2018 11:36 ..
01/03/2018 11:36 16,384 attachments.dat
01/03/2018 11:36 81,920 event_data.dat
01/03/2018 11:36 147,456 event_index.dat
01/03/2018 11:36 32,768 folders.dat
01/03/2018 11:36 16,384 task_data.dat
01/03/2018 11:36 81,920 task_index.dat
01/03/2018 11:36 16,384 timezones.dat
7 File(s) 393,216 bytes

Directory of E:\Users\Chris\AppData\Roaming\eM Client\24f64724-4b5e-4893-a708-b1f2d1f05c7b\a883afd0-da7f-4672-86a9-a137c6272739

01/03/2018 11:36 .
01/03/2018 11:36 ..
01/03/2018 11:36 16,384 attachments.dat
01/03/2018 11:36 81,920 contact_data.dat
01/03/2018 11:36 577,536 contact_index.dat
01/03/2018 11:36 40,960 folders.dat
4 File(s) 716,800 bytes

Directory of E:\Users\Chris\AppData\Roaming\eM Client\24f64724-4b5e-4893-a708-b1f2d1f05c7b\d678e7bd-ee24-4c94-9cce-0c5e1bf8275f

01/03/2018 11:36 .
01/03/2018 11:36 ..
01/03/2018 11:36 85,827,584 conversations.dat
01/03/2018 11:36 32,768 folders.dat
01/03/2018 11:36 123,682,816 mail_data.dat
01/03/2018 11:36 38,440,960 mail_fti.dat
01/03/2018 11:36 83,005,440 mail_index.dat
5 File(s) 330,989,568 bytes

Directory of E:\Users\Chris\AppData\Roaming\eM Client\Archive

01/03/2018 11:36 .
01/03/2018 11:36 ..
01/03/2018 11:36 114,688 conversations.dat
01/03/2018 11:36 32,768 folders.dat
01/03/2018 11:36 16,384 mail_data.dat
01/03/2018 11:36 86,016 mail_fti.dat
01/03/2018 11:36 114,688 mail_index.dat
5 File(s) 364,544 bytes

Directory of E:\Users\Chris\AppData\Roaming\eM Client\Local Folders

01/03/2018 11:36 .
01/03/2018 11:36 ..
01/03/2018 11:36 16,384 attachments.dat
01/03/2018 11:36 16,384 contact_data.dat
01/03/2018 11:36 212,992 contact_index.dat
01/03/2018 11:36 24,702,976 conversations.dat
01/03/2018 11:36 16,384 event_data.dat
01/03/2018 11:36 77,824 event_index.dat
01/03/2018 11:36 53,248 folders.dat
01/03/2018 11:36 1,190,113,280 mail_data.dat
01/03/2018 11:36 361,472,000 mail_fti.dat
01/03/2018 11:36 17,485,824 mail_index.dat
01/03/2018 11:36 16,384 task_data.dat
01/03/2018 11:36 81,920 task_index.dat
01/03/2018 11:36 16,384 timezones.dat
13 File(s) 1,594,281,984 bytes

Directory of E:\Users\Chris\AppData\Roaming\eM Client\Logs

01/01/2025 13:19 .
01/01/2025 13:19 ..
0 File(s) 0 bytes

Directory of E:\Users\Chris\AppData\Roaming\eM Client\Search Folders

01/03/2018 11:36 .
01/03/2018 11:36 ..
01/03/2018 11:36 16,384 attachments.dat
01/03/2018 11:36 16,384 contact_data.dat
01/03/2018 11:36 204,800 contact_index.dat
01/03/2018 11:36 114,688 conversations.dat
01/03/2018 11:36 16,384 event_data.dat
01/03/2018 11:36 77,824 event_index.dat
01/03/2018 11:36 32,768 folders.dat
01/03/2018 11:36 16,384 mail_data.dat
01/03/2018 11:36 86,016 mail_fti.dat
01/03/2018 11:36 114,688 mail_index.dat
01/03/2018 11:36 16,384 task_data.dat
01/03/2018 11:36 81,920 task_index.dat
01/03/2018 11:36 16,384 timezones.dat
13 File(s) 811,008 bytes

 Total Files Listed:
          58 File(s)  1,927,839,744 bytes
          29 Dir(s)  92,484,395,008 bytes free

What is the correct way to transfer this to a new PC?

cyberzork · October 16, 2025, 9:59pm

I am currently running eM Client on an older PC under Win 10 and which cannot be updated to Win 11 so i will need to acquire a new PC and transfer the email and calendar data.

The best way to move eM Client mail & calendar etc complete is to “use the built-in backup and restore program”. Or alternatively you can also copy “the complete hidden database folder”.

See the below link for how to.

eM Client support page - " New device and eM Client? No problem!"

https://www.emclient.com/blog/new-device-and-em-client–no-problem-175

When that is complete I will remove them from my mail account.

If you want to store emails outside of eM Client long term and have eM Client V10, you can create eg: (.emdf) Data Files to store mail which can be unmounted & re-mounted again anytime to add mail, delete mail or just view.

Note:- To backup the data file (like a .pst file), unmount it and then copy the .emdf file elsewhere.

eM Client Support documentation on Data Files

https://www.emclient.com/webdocumentation/en/10.0/emclient/default.htm#Data%20Files/Data%20Files.htm

Or you can just eg: create a folder on your desktop or other folder location to store any old mail and export your mail to that folder into (.eml) messages which can be reimported anytime to view.

eM Client Support documentation on Exporting to (.eml)

https://www.emclient.com/webdocumentation/en/10.0/emclient/default.htm#Getting%20Started/Export/Export%20E-mails%20to%20.eml%20files.htm

eM Client Support documentation on Importing (.eml) files

https://www.emclient.com/webdocumentation/en/10.0/emclient/default.htm#Getting%20Started/Import/Import%20from%20.eml%20file.htm