Reason 1: Many Android devices do not have a built-in feature for opening a PDF file. So you cannot open it. Reason 2: Your PDF files are corrupted. Many reasons can cause the corruption of PDF files, like virus attacks or hardware damage.Jan 10, 2024
Source : https://updf.com/mobile-app/how-to-open-pdf-files-on-android/
All photos and videos you take with Camera are saved in Photos. With iCloud Photos turned on, all new photos and videos are automatically uploaded and available in Photos on all your devices that are set up with iCloud Photos (with iOS 8.1, iPadOS 13, or later).
Source : https://support.apple.com/guide/ipad/view-share-and-print-photos-ipad99b53b6d/ipados
How Do You Right-Click on a Laptop Without a Mouse? If your Windows laptop has a touchscreen, tap-and-hold an item or text field to bring up right-click options.Mar 7, 2022
Source : https://www.lifewire.com/right-click-on-laptop-5218239
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Source : https://m.youtube.com/watch?v=o03ceKisYVU
Sometimes, corrupted system files or bad sectors on Windows system drive may cause hard drives, folders, or files inaccessible. Therefore, fixing corrupted system files and repair bad sectors on the hard drive may help you fix the Downloads folder that won't open error.Jan 4, 2024
Source : https://www.easeus.com/file-recovery/cannot-open-downloads-folder-in-windows-10.html
Your laptop doesn't have a PDF reader installed. Your PDF reader or preferred program is out of date and needs an update. Your PDF application is potentially damaged or needs to be rebooted. The PDF is potentially damaged or tampered with.
Source : https://www.adobe.com/acrobat/hub/why-pdfs-will-not-open.html