: At least 2 GB of available disk space on an NTFS volume.
If you are running this version on an older machine, the minimum requirements include: : x64-compatible dual-core (Intel or AMD). RAM : 4 GB minimum (16 GB recommended). : At least 2 GB of available disk space on an NTFS volume
How to install previous version of Illustrator v28 - Adobe Community : At least 2 GB of available disk space on an NTFS volume