That's probably indeed the case, but it doesn't excuse it. When you buy a hard drive or USB stick, you get a certain amount of GBs to use as you please. If you

That's probably indeed the case, but it doesn't excuse it. When you buy a hard drive or USB stick, you get a certain amount of GBs to use as you please. If you put a 1GB file on it your free space decreases by 1GB (yes this is filesystem dependent and you might lose a few KBs for metadata, but the choice of filesystem is up to you and not mandated by the storage decide). It doesn't matter that the NAND controller probably used a few megabytes of the overprovisioned area to store its block mapping tables, or maybe even duplicated your data for its convenience - you were never charged for that overprovisioned area. Here, you are sold a storage device (that you access over HTTP instead of SATA/PCIe), but when you write a 1GB file, they duplicate/convert/etc it for their convenience yet still charge you to store those duplicates you haven't asked for. That's new and unexpected.