You can do this by go to “App or Music > All > press and hold the item > Delete from Cloud.” There you have, and now enjoy more space in your Kindle device. mouse over this then left click on compressed.
If you think that you no longer need specific item, you can remove it from Cloud storage as well. To zip anything just find it on your computer (I am assuming windows here.) if you are in calibre left click on 'click to open' in the book info to find the file, then right click on the filename and you will get various options already built in to windows. Now you have successfully removed unneeded item from your Kindle device. If you use micro SD card, you will find more option labeled as “SD Card Storage.” Tap on it to manage the content that was stored in there.
If you are not sure, tap Archive once to grouped the. If you simply want to remove all item that you haven’t use for a long time, tap Archive Now. In here there are several options to choose. You can also find the address on your Kindle under Settings > Device Options. To remove an item from Kindle device, follow the guide below: Go to Settings by swipe down the screen, then choose Storage. (You can choose a bunch of files as well as individual files.) 3.
Next, right-click on the desired PDF files and choose the required PDF files to be sent to the Kindle. To find your Send-to-Kindle e-mail address, visit the Manage Your Devices page at Manage Your Kindle. Use an Internet Browser of your choice and, select the required PDF file to be uploaded. If your file is larger, we suggest splitting it into smaller files or optimizing the file to compress images, etc. If you want to delete it, select the checkbox next to the file and then tap “Remove.” 50MB is the maximum size allowed to send to Kindle. Tap the category to view the list of files and size.
If you simply want to remove all item that you haven’t use for a long time, tap “Archive Now.”