I am leery about cloud storage plans that offer huge online storage at a very low cost. I started with Skylab which soon after I subscribed, went out of business. Next I went with Zoolz and was supposed to have had a lifetime license. After a while, I was contacted by Zoolz management who told me they could no longer support my lifetime subscription without charging an additional fee. Needless to say, I quit Zoolz. Currently I have pCloud with 500 gb storage, 1/2 the storage offered by the other two outfits. I have had pCloud for a very long time and they have proven to be reliable.
The problem as I see it is that these cloud storage companies can’t really afford to offer huge storage plans for a very little amount and soon or later, you will be disappointed. If it seems to good to be true, it probably is.