What does it mean that there is a blue double arrow in the upper right corner of the win 10 file label?

This is because the "compression or encryption attribute" function is turned on in office software. Take the office word file as an example, you can set it by the following method steps, so that the blue double arrow icon is not displayed on the icon. The specific steps are as follows:

1. Open the computer desktop, find the word document icon with the small arrow, then select the icon, click the right mouse button, and find "Properties" at the bottom of the open list:

2. Open the properties, then find the "Advanced" option in the page and enter the settings:

3. Click to enter the advanced settings page, use the mouse to remove the box in front of the two options under "Compression or encryption properties", and then click "OK" to set the excel document as well, so that the blue arrow on the document can be cancelled: