Mass Import actions are actions that can get applied to all accounts in an "imported" spreadsheet.  Using a spreadsheet allows you to have confidence and insight into exactly who will get the action applied to them, as well as letting you curate that list in any way you desire, like combining two lists or removing certain individual accounts.

You can generate your spreadsheet of members to archive using AMP directly!  Use the filters to target accounts that probably should be archived (we recommend leveraging date filters on things like membership expiration and last-active).  Once you have a group, click the Actions -> Export button on the far right of the table.

On the Export page, all you need for the import spreadsheet is the Email column of the member.  You can add/remove any other columns from your export that you desire to help you curate that spreadsheet after you download it.

To perform the action (archiving here), from your Manage -> Members page, select the Import -> Mass Archive Members. 

On the import page, click the Choose File button, locate your spreadsheet (it must be in CSV format), and select it.  This will start the mass import action on the members in that spreadsheet.

If you get any errors, you can either try to archive those member accounts manually or contact AMP support to take care of it.