Moving to Groups.io
(without the Easy Yahoo Group Transfer mechanism)

The Easy Yahoo Group Transfer mechanism was a service available only to groups on the Premium Yearly plan. Due to Yahoo's imminent removal of all Yahoo Group online member content (Conversations, Files, Photos, etc.),  the transfer service has been discontinued.

Yahoo has extended the window for requesting a download of your group. January 31, 2020 11:59pm PT - see https://groups.io/g/GroupManagersForum/message/25833

This page discusses methods for moving any archived group content you have, whether from a Yahoo Group or other list/group service, into a Groups.io group.

FAQ

Is groups.io free?

Yes. It is free for members, and it is free for a group on the Basic plan. Groups.io runs on a Freemium pricing model. You may upgrade your group to a paid Premium or Enterprise plan if you want or need more features and/or more storage. See the pricing and features to decide for yourself.

Where can I find out about starting my group and setting it up?

The necessary first step to moving a group or email list to Groups.io is to set up a group here. Here's a quick guide:
https://groups.io/g/GroupManagersForum/wiki/Quick-Start-for-Group-Formation

Where can I find instructions for joining a group?

You can join one or more existing groups to get a feel for how they operate:
https://groups.io/g/GroupManagersForum/wiki/Joining-a-group

Note: groups are highly configurable to suit the needs of their community. Don't assume that any one group, or even a small collection of groups, will be representative of all the ways a Groups.io group may be configured.

From Yahoo! Groups

How do I download my Yahoo Group's Members list?

If your group has 1000 or fewer members:

To obtain a list of your Yahoo Group members you can go to the Manage Members page and in the Actions menu Export (download) a CSV or TSV format file. It is best to open the file in a spreadsheet like Excel, then you can easily copy the Email column to paste into the Direct Add or Invite page. Note: this is only for groups with 1000 or fewer members, due to Yahoo's Export restriction.

If your group has more than 1000 members:

Use PG Offline ($25 USD) or the chrome application for downloading members (free). PGO produces a CSV format file, the file produced by the Chrome app is tab-delimited.

As of December 16, the Chrome app still works, but you must be a Moderator of the Y!G to get the email addresses. Whether PGO still works remains unclear.

How do I save my Yahoo Group content?

Time is running out to copy Messages, Files, Photos, and other user content from Yahoo Groups. They were scheduled for removal from web access on December 14, 11:59 pm PT (2019-12-15 07:59 UTC) — actual removal occurred in December 16.

This affects manual copying as well as tools like PG Offline and the Chrome browser application.

Yahoo Download Requests

Yahoo has extended the last call for download requests to January 31, 2020 at 11:59pm PST (2019-12-15 07:59 UTC). Read a copy of the notice on Y!GMF. (And revised date - https://help.yahoo.com/kb/SLN31010.html )

The strength of the Yahoo method is that it retrieves a full copy of your groups' messages, in mbox format, which can be opened and uploaded or imported later. A weakness of this method is that it doesn't seem to reliably include all of any other type of content (Files, Photos, Attachments, Links, Databases). It does not include the groups' Members list nor its Calendar entries. The mbox files it delivers only have placeholders for the attachments, they are delivered separately.

To do this you must sign in to Yahoo as at least a member of the group in question. Yahoo will ask you to re-confirm your sign-in credentials each time you visit this page (first to request the download, then to download it when ready): https://groups.yahoo.com/neo/getmydata You will be given a link to one or more zip files to download, the mbox files for your group's messages will be nested within (one of) those zip files. You must request the download by January 31 2020 in order for your request to be honored.

How to download content from Yahoo - see https://groups.io/g/GroupManagersForum/message/19430 

Manual and third-party tools

PG Offline is a third-party utility to download a copy of your Yahoo Groups' contents. $25 for unlimited downloads, limited free trial. A strength of this method is that it is usually able to download a full copy of each groups' content. A weakness of this method is that if you are not at least a moderator of the group the message archive does not have sending member email addresses and it does not include the group's Members list. It also does not include the groups' Database nor its Calendar entries, and will probably quit working entirely on December 14, when Yahoo Groups takes down its online content.

As of December 16, the Chrome application for downloading messages no longer works, nor can you access any of this group content manually. 

Archive Team

An organization known as Archive Team is backing up the entire Yahoo Groups on https://tracker.archiveteam.org/yahoogroups/ This group has a few thousand computers activated as a massive effort to retrieve and archive all of YG.  No matter how big or small the group may be.  As for private groups, they do 1 of 2 things, 1) request membership and then archive or 2)  ask from their site for owners and mods to send an invite to the group.  See https://www.archiveteam.org/index.php?title=Current_Projects

However in Ars Technica, it is reported that Yahoo stopped their backup. (Dec 9, 2019)

Uploading to Groups.io

Uploading member lists (email addresses)

Saving your member list may be particularly important to you.

• On the Basic plan (free) you can upload a list of members to the Invite page. Similar to a Yahoo Group, it sends an invitation to each email address and the invitee must receive and respond to the invitation before they are added to the Members list.

Details: https://groups.io/g/GroupManagersForum/wiki/Inviting-new-members

• You can Upgrade your group to the Premium for one month plan ($20 USD) in order to upload a list of members (Direct Add).

Details :Direct Add members

• Send a message to your YahooGroups members on YahooGroups inviting them to join your new home. Include the URL. Or tell them to send a blank email to the Subscribe email address found at the bottom of your group's home page (that is, [GROUPNAME]+subscribe@groups.io  substituting the real group name for GROUPNAME). Since you won't be using a G.io invitation, you may have trouble tracking members who don't respond. 
  
  

Uploading a message archive

Here's an overview:

https://groups.io/g/GroupManagersForum/message/25789

- Lena has a way to get the messages into the archive, https://groups.io/g/GroupManagersForum/message/22251 

Free. This works from an mbox file (e.g. a getmydata download from Yahoo), not from a PG Offline download. The script has mechanisms intended to post messages as if From the original sender, even if a change of email address is involved. The script cannot get the date to match the original posting date, but does include that information in the message body.

- If you have a PG Offline download, we read that PGO-2-GIO will post the messages with their attachments attached. Problem is, the program does not seem to be available. Monitor the site at http://www.personalgroupware.com/ to see if this ever changes. 

PGO-2-GIO doesn't work from a getmydata download, but you may be able to import the mbox file into PGO.  It will import from a PG Offline download, and presumably reattach any attachments. PG Offline is a Windows program. (You could set up a Windows emulator on your Apple computer.) For more information, search the messages of GMF.

It is believed that PGO-2-GIO will put the original From and Date information for each message into a banner at the top of the message content. The From and Date shown by Groups.io will be the person running the upload and the date/time of the upload.

- Other

Once you get an download of some kind, an option is simply to print the collection of old messages to a PDF file; at which point you can upload that to the files area of your group. That will give you something, even if it isn't conveniently indexed and searchable.

Importing a message archive

If you can obtain the group's messages in mbox format (specifically mboxrd), Groups.io may be able to import them into your Groups.io group for you. For this, you must pre-pay for Premium Yearly service for your Groups.io group. The advantage is that the messages will be imported with the original From and Date information intact. Contact support if/when you're ready to go ahead with that. Note that an mbox file includes only the group's messages, you will still need to copy the group's members list, photos, files, and other content by alternate means. Note too that the mbox file(s) delivered by Yahoo's download do not include attachments.

Photos, files and other content

You'd need to upload them manually. It can be time consuming and "ownership" of all the items will be in your name.  

If the person that originally uploaded a picture is on the new group, you can manually assign ownership to them (if you know who it was).  There's currently no similar reassignment function for Files.