I can't drag and drop emails in Microsoft format MSG into Outlook 2013

I have 20 emails which i wanted to take backup, i took all emails drag and drop from outlook to windows explorer and all messages are .msg now i deleted all the messages from the server and need to took them from widows explorer to outlook 2013 to upload them again to the server all the answers say drag and drop from windows explorer to outlook but when i do that this message appears

Creating a new item from the selected items could take some time…are you sure you want to create a new item from these items…?

if i said no , nothing happen but if i say yes it opens a new message and mage the selected messages which i drag as attachment

is there a way to get all my messages back to outlook if i have .msg emails in a folder?

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