sting919,for Chromebook, how do I view pictures on my Google Drive offline?
Only some photo suggestions, once you have added off line drive capability.
Remember you may not have a lot of hard drive memory on your system, and you may have a lot more on-line storage. 32 Gig flash cards are very affordable, and can hold a lot of photos if they are not in RAW format, or very large tif files. Saw a 1 TB external hard drive for less than $60 on newegg.com the other week.
Yes you can add external HD and copy to and from from a memory card. ChromeOS has a basic file manager which can be accessed using CTRL+M
Using the Files app - Chrome OS Help