Save your Outlook.com email attachments to 'Specified Folder' in OneDrive

Save to OneDrive Features is a simpler way to manage and save your email attachments directly in OneDrive but by default it will store all attachments in a specified folder. (email attachments)

But if you want to save the file at different location so that you don't have to move the files later on, you can follow steps below. 

1) Click Actions as shown in figure below. 

2) Right click the file and click Save as

3) Select the path (one drive or windows folder) where you want to store the files.