Hello, I know that if using the Mini M4 as a general purpose computer, it is better to upgrade the SSD to 512GB or 1TB. In the case of using it with an external SSD mainly as a NAS for file sharing among multi-platform devices of different OS (MacOS, Windows, iOS, Linux, perhaps also Android), is the base model with 16GB RAM and 256GB SSD sufficient? The storage of my iPhone with 256GB is almost full and I don't use 3rd party cloud services including iCloud.