Open 0xr.space, press Open and choose the .zip, .rar or .7z. The archive is unpacked in the browser, the model files inside are found, and a glTF's .bin and textures, or an OBJ's material library, are matched to it by name. Every model in the archive is imported, each with its own card. This works on the Quest, which has no unzip tool of its own.
A ZIP can be up to 3 GB and is read in pieces rather than all at once. A RAR or 7z can be up to 512 MB. Password-protected archives, split RAR parts and an archive inside an archive are not opened.
The model names a file the archive does not contain. The review lists those names; choose the missing images too, or open the model anyway untextured.
No. Remove the password, or extract the archive and open the files themselves.
Join the parts into one archive first; a single part is refused with a message saying so.
No. It is unpacked on the device, and nothing is sent to a server unless you create a share link yourself.