What does this folder icon with two blue arrows mean? [duplicate]

While browzing through my Windows directory, I found the Panther subdirectory, which had this icon:

Does anyone know what this signifies? I was able to open it normally, and it was, to all appearances, a normal directory.

Solution 1:

• This means the folder is compressed. You can right click on a folder and see that Compress contents to save disk space is checked.

• The Panther folder is created when you first install Windows or when you run the Media Creation Tool or Update Assistance Tool from Microsoft.

• The NTFS file system used by Windows has a built-in compression feature known as NTFS compression. NTFS compression makes files smaller on your hard drive. NTFS compression is ideal for files you rarely access and saving space on small HDD.

• To get started, right-click the file, folder, or drive you want to compress/decompress and select Properties. Click the Advanced button under Attributes. Enable/Disable the Compress contents to save disk space check box and click OK twice. If you enabled compression for a folder, Windows will ask you whether you also want to encrypt sub folders and files.