If this is a legitimate technical requirement, mentioning it on the requirements page would be nice. A minority of Windows users deliberately curtail use of NTFS for technical reasons.

Anyone else see this message during installation?

fat32 is a relic, and a bad one..
convert your hdd to ntfs for better speed, and also fat32 doesnt support larger files than 2gb, so you need ntfs. How to convert all hdd to ntfs i dont want to advice even though i might be right but i dont want any chances to make your pc dont work..

Found the cause: the installer drops a file of around 9GB. A warning on the requirements page here at gog.com is probably low-cost and still useful to have.

If you have the hardware to run TW2, there's really no point in th world to be using FAT32.

You're still using FAT32? It can't handle files larger than 2GB... it IS a relic.

Actually I think the limits are:

FAT = 2GB
FAT32 = 4GB

There is absolutely no reason for not using NTFS for your system partition.

No, Fat32 still has the single file 2gb limit, learned that quick doing video editing

As a workaround, you could create a new partition just to install Witcher to and format it NTFS.

I wouldn't expect too many programs to be tested for FAT32 compatibility though. Perhaps you should segregate whatever legacy applications are requiring you to hold onto FAT32 from the rest of your stuff.

One possibility is alternative operating systems, particularly those without a viable full-featured filesystem driver for NTFS.

Anyway, I consider this matter closed. Enjoy the game folks!

I use exFAT partition, the maximum file size it supports is 16 EB. Yet, still, get an error. Not mentioned exFAT was introduced by Microsoft. It isn't about file size at all. What kind of people design software based on a specific partition format? It is awful.

exFAT vs. FAT32 Comparison
Feature FAT32 exFAT
Maximum Volume Size 8 TB * 128 PB
Maximum File Size 4 GB 16 EB
Maximum Cluster Size 32 KB ** 32 MB
Maximum Cluster Count 228 232
Maximum File Name Length 255 255
Date/Time resolution 2 s 10 ms
MBR Partition Type Identifier 0x0B, 0x0C 0x07