To archive your posts
Open the Facebook App
Tap menu at the top right corner for Android users or tap your photo at the bottom right for iPhone/iPad
Tap the gear icon at the top right next to the magnifying glass
Scroll down to your activity section and tap activity log and tap manage your posts
From here, you can tap Filters. This is optional. You can filter by:
Categories
Date
People
Once you find the post you want tap the menu on the right
Tap move to archive
You can also move posts that’s in Archive to Trash.
In Archive, tap the box next to the post
Tap Trash at the bottom. Tap Move to Trash to confirm
Once you've moved the posts to Trash, it'll be deleted after 30 days and can't be restored.
Restore your posts from Archive and trash
After you’ve moved a post to your Archive, it’ll only be visible to you. Once you have moved your posts to trash you have 30 days to restore the post before its permanently deleted. When you restore your post, it will be visible to the same audience you chose before you archived your post.
Tap the settings which is the gear icon at the top right next to the magnifying glass
Scroll down to your activity section and tap activity log
At the top of your activity log, tap Trash or Archive
From here, you can:
Restore your posts to where it was when you posted it:
Tap the box next to the post
Then tap Restore at the bottom.
Tap Restore to confirm