XCF save file too big (error when saving)

[margimp]

Hello, I'm having trouble trying to save a "project" (xcf file) on GIMP. I get the following error: "could not seek in xcf file invalid argument". From what I managed to find online it may be because the save file size is over 2GB. I wanted to know if there are any workarounds for this issue and also know why is the XCF so big when my original image is a jpg file of only 130mb and I have barely added any features in it, just about 4 paths. The bottom part of the gimp window is showing "filename.jpg (7.9GB)" and I have no idea where did that 7.9GB came from since, like I said, I've opened a 130mb jpg image. I used to have a ~7.5GB filme with the same name as this one (higher res version) but I've deleted it already and opened gimp by right clicking the new file (130mb) and selecting "open with GIMP".

Thanks in advance.