Apart from iCloud there is Google Drive, OneDrive, Dropbox, Mega, Box etc. but it's a little more complicated than that. You have to be able to access the files and the service needs to be compatible with the apps you are using it with. See; https://www.thebalance.com/a-compar...eeae965b-8d31-473e-802a-bfb41a9836b5-0-ab_msb
GoogleDrive for example has an iPhone app and offers free 15Gb of storage for photos, movies and other files.
DropBox offers 2-16Gb and OneDrive 15Gb
See; https://www.imobie.com/support/icloud-alternatives.htm
BUT why not just download them to your computer and switch off iCloud Photo Library? I don't use it myself but, I do use My Photo Stream to ensure my pics are downloaded to my MBP then I delete them from the phone. You will need to switch it off in Settings > Photos and Camera on your iPhone and also on the device you sync to in iCloud Preferences > Photos.
thanks i'll try this