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--- how_to:upgrade_vpop3_to_version_5 [2012/03/20 12:22] – simon
+++ how_to:upgrade_vpop3_to_version_5 [2014/07/16 12:28] – paul
@@ Line 1: / Line 1: @@
-======How To Upgrade VPOP3 to version 5======
+======How To Upgrade VPOP3 to version 5 or later======
 Upgrading VPOP3 is usually a straightforward process. [[Download VPOP3]] from our web site and [[Backup VPOP3|back up your current installation]] just in case something goes wrong. Then simply run the installer that you downloaded and install it over the top of your existing VPOP3. All your settings and mail will be preserved.
-**Please note that VPOP3 version 5 requires Windows XP/2003 or later. If you have Windows 2000, then version 4.0 is the latest supported version. Earlier versions of Windows are no longer supported**
+**Please note that VPOP3 version 5 and later requires Windows XP/2003 or later. If you have Windows 2000, then version 4.0 is the latest supported version. Earlier versions of Windows are no longer supported**
 Note that if you are upgrading the **Major** version (eg 1.x-4.x to 5.x) then you will need a [[upgrade licence key|new licence key]].
@@ Line 25: / Line 25: @@
   * [[install_to_external_pgsql|Install using external PostgreSQL Database]]
   * [[installation_conflicts|Installation Conflicts]]
+=====Disk Space=====
+We recommend having lots of disk space on the VPOP3 computer. Disk space is not expensive nowadays (unless you are using fast SAS drives).
+By default VPOP3 version 5 does a full backup of its data daily, and on a weekly rotation. Versions 3 and 4 only did a partial backup, and earlier versions didn't backup at all. This means that the backup data may use up a considerable amount of disk space (eg if your database is about 10GB, the backups may take up about 28GB (they are compressed, so each day's backup may be about 4GB)). You can [[handling_database_backups|move the backups]] to another drive if you wish.
+Also, VPOP3 has a 'recycle bin' facility which keeps deleted messages for a few days, and it also stores more other data than previous versions.
+As a rough guess, if you are using version 3 or 4, find the size of the VPOP3\_messages folder (and sub folders), multiply that by 3 or 4, and that will be the minimum amount of extra free space you should have over what you are already using (if you are keeping backups in the default location)
+If you are using version 1 or 2, find the size of the whole VPOP3 directory, multiply that by 4 or 5, and that will be the minimum amount of extra free disk space you should have.
+If you move the backups to a different location, then you will need less extra space in the VPOP3 directory.
 =====Downgrading=====

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