Just note that thumb(flash) drives may use less reliable memory. Manufacturers generally reserve their best for SSD, and the remaining for flash drives. Plus, always keep two copies of your photos and don't rely on any one source to store them, such as local drive+cloud storage or DVD/Bluray.
If you're concerned about photo ownership issues for online photo storage, than use cloud based file storage instead. Such as Dropbox, Google Drive, Microsoft One Drive, and encrypt them before upload. Therefore, they look just like a file on the cloud end, and only photos when decrypted on your end. There are a number of apps that will encrypt/decrypt folders on the fly for cloud storage.