Migrate Classic Sites to New Sites

Migration tools to transition your classic sites were released in 2018.  Both classic and new Sites will continue to be supported during this time. Timelines and instructions regarding the gradual depreciation of classic Sites were released in 2018. The specific depreciation date

Read More  *** Note that the help file is updated indicating that site conversion is or will soon be available, even though many features are still unavailable in New Sites.

If your site is mapped to a domain, remove the mapping before migrating it.

After Migrating  you may have to add the custom URL to the migrated site. 

https://support.google.com/sites/answer/9068867

You may have to make the new site public

After you migrate if you published to the original classic Sites URL then the classic no longer exists and your new Site has replaced it.  A copy of the classic site is kept for 30 days in migrated sites if you need to take a copy of it.

After you migrate if you published to a new URL then the old site just remains exactly where it is completely unaffected.  You will have two completely separate sites that are not connected in anyway.

Migration will fail for some large sites. You can try copying some site content to a new site and see if it will migrate, or maybe just wait until the migration process is improved.

Please note that if you try to migrate a site too often you can be blocked for a while from further attempts.

For a test I created a new Classic site that contains a text box with some text and a table. I then migrated it to a site in the New Format.

List pages are converted to a spreadsheet that is stored in Google Drive and inserted into your page.

NOTE: The spreadsheet is not automatically shared. You must access the spreadsheet and set its sharing to public or anyone with the link in order for it to be viewed by site visitors.

Attached  or File Cabinet files will be moved into a Google Drive folder and inserted into your site.

NOTE: The folder is not automatically shared. You must access the folder and set its sharing to public or anyone with the link in order for it to be viewed by site visitors.

You will get some warnings about this when you migrate a site but they are collapsed and easily missed.

Examples:

List pages detected. Your site contains list pages. They will be converted into Google Sheets and will be embedded in the new draft. The Sheets can be found in your Google Drive.

File cabinets detected. Your site contains file cabinets. Files stored in file cabinets will be added to a new Google Drive folder. The new folder will be named after the converted site and will be embedded in the new draft. Links in the file cabinets will be placed on the page above the embedded folder.

Page attachments detected. Your site contains page attachments. Files attached to a page will be added to a Google Drive folder named after the converted site. In the new site, attachments will be embedded in a Google Drive folder at the bottom of the page.