Hello Alex,
Remove the Compact Flash Card from your Canon 300D and use a USB to Compact Flash CArd (and other cards) adapter. They are a few dollars to a max of 20-30 on eBay. When you plug it in to your computer's USB socket in will pop up and be able to be read as a folder. Probably similar available in most PC stores and other retailers...
https://www.ebay.com.au/sch/i.html?_...f+usb&_sacat=0
Best
JA