I went for ThunderDrive 2TB deal and updated to 4TB. I can only say it was pretty well a mistake.
The only way to put files on ThunderDrive is through a web browser, which is really pron to of all things renaming the folders you upload.
They have been “Working” on mobile apps and a desktop client well, forever, they keep moving the goal posts back every few months. Well last year it was mobile apps in the 3rd quarter and desktop app in the 4th quarter of last year 2019. Well beginning of this year 2020 they have move the release dates again. Honestly I don’t even think they are trying.
I would say, stay away from ThunderDrive at all cost at this time until they improve. I went with another lifetime online drive provider and have not regretted it since. The one I went with actually maps a drive in Explorer so all you have to do is copy files to like the P: drive and wham, they are in the cloud.
My 2 cents.