How to Create a Static List from a Dynamic List

Open the Subscribers & Lists folder and click Lists
Click the Add List button and then select the type Dynamic.
1. If you already have a list you would like to split, skip to step 7.
Select the lists you want to use as a basis for your dynamic list
Create rules to filter these lists
1. Click the + icon to add another rule or the - icon to delete the rule
2. Select a custom field or subscriber interaction, such as they opened an email in the last 30 days, from the first drop down menu
3. Fill out the other rule options
Click Save Rules
To view the approximate list count from the specified rules, click Save and Show List Count
Click the Create Static List button in the bottom right corner
Enter a name for the static list ("Part X/2", "Part Y/2", etc will automatically be added to this name for each part of this list, if you split this list)
If you would like to split the list into any number of parts, select the desired option from the Split List drop down menu. If you do not want to split your list, ignore this option.
If you would like to randomize how the lists are split, select Randomize from the drop down menu. Otherwise, subscribers will be added into your list in the order they were added into your account.
Click Create New Static List
The lists are now saved in the Lists folder