On D Drive: '''Create a folder called 'TBIRD'''' Exit Thunderbird * In bottom Windows search type: %Appdata% * Select '%Appdata% file folder * Select 'Roaming' * Select 'Thunderbird' * Copy the 'Profiles' folder * Paste it into 'TBIRD' folder on D Drive. so you now have D://TBIRD/Profiles Start thunderbird * Help > Troubleshooting Information * Under 'Application Basics' near the bottom - Profiles' - click on 'about:profiles' It opens in a new tab * Click on 'Create a new Profile' * click on 'Next' * Enter a new user name eg: Default User * Click on 'Choose Folder' * navigate to the D Drive, locate and select the correct 'profile name' folder which is usually something like this 'abc1234d.default' * eg: D://TBIRD/Profiles/abc1234d.default * Click on 'Select Folder' * Click on 'Finish' You should see a new Profile called 'Default User' appear in the list. It will say the 'Root directory: info will point to profile name in D drive.' Below it will be some buttons. * Click on 'Set as default profile' * Click on 'Launch Profile' It will open Thunderbird on that new location in a new window. * Close/Exit the original Thunderbird window. The above has auto edited the 'profiles.ini' file located in the 'Thunderbird' folder here: * C://Users/User name/Appdata/Roaming/Thunderbird Thunderbird is still using some files in that C Drive directory, but it should now be directed to the D Drive when it comes to the actual storage of mail. Just check the following is ok. * Access Account Settings * Select 'Server Settings' for account in left pane * Look bottom right for 'Local directory' * Is it pointing to the correct location on 'D Drive' ? eg: D://TBIRD/Profiles/profile name/Mail/mailaccountname If yes, no worries all is ok. If no: * click on 'Browse' * A new window opens currently showing you the contents of that account name folder. * navigate to the D Drive, locate the same account name. * for a pop account eg: D://TBIRD/Profiles/profile name/Mail/mailaccountname * Select that mailaccount name folder and then click on 'Select Folder' * Do the same for each account. * Then do 'Local Folders' * Select 'Local Folders' in left pane * It will show 'local directory' - click on browse * navigate to the D Drive, locate 'Local Folders' * eg: D://TBIRD/Profiles/profile name/Mail/Local Folders * Select 'Local Folders' folder and click on 'Select Folder' When all is working ok, do you want to recover some space on C: Drive? If yes, Exit Thunderbird, Access C Drive I would advise you keep all the main structure intact as there are some files still being used so Thunderbird knows where to look to locate stuff on D Drive, but remove all the folders that are containing a load of emails as they are using the most space. * C://Users/User name/Appdata/Roaming/Thunderbird/Profiles/profile name folder delete this file: global-mesasges-db.sqlite It's not actual emails - it's data used for global search you can safely delete Then click on 'Mail' folder delete all the mail account name folders. delete 'smart mailboxes' folder if it exists. Select the 'Local Folders' folder and delete all contents. Back in 'profile name' folder - select 'ImapMail' folder delete all the imap mail account name folders.

THANK YOU SOOOOOO MUCH!