Wait, really? Are you sure?
I ask primarily because, this sounds a little too close to "Downloading roms you don't own is legal as long you delete them within 24 hours." ;)
but specifically excludes software
https://en.wikisource.org/wiki/Polish_Copyright_Law#Chapter_...
Art. 23. Copyright The scope of the work's own personal use 1. Without the author's permission, you may use an already disseminated work for your own personal use free of charge. This provision does not authorize to build on the basis of someone else's architectural and urban planning work and to use electronic databases that meet the features of the work, unless it concerns own scientific use not related to profit-making purposes. 2. The scope of personal use includes the use of single copies of works by the circle of persons remaining in a personal relationship, in particular kinship, affinity or social relationship.
But software is explicitly excluded by 77:
Art. 77.[32] does not apply to computer programs art. 16 pkt 3-5, art. 20, art. 23, art. 23 ....
Personal use defined in article 23 might have something to do with copy tax we get on computer media like CDRs, USB drives and even ordinary HDDs.
Yes, you can get microSD cards but there's still not enough space and I'd rather avoid swaps entirely.
https://www.amazon.com/dp/B0887GP791
There are 512GB and 1TB cards too if you want to pay for them.
Though I agree it'd be nice to have network storage support, it's a niche feature that goes against the mobility aspect of the switch.
Plus, there's an explicit statutory carveout for archival/backup copies of computer programs, which would apply to games.