This is a list of NTFS and Google Drive-friendly ASCII chars that can be used to substitute some of the forbidden ones:
Remember you need to hold down the ALT key on your keyboard while you type the number with the numpad.
7 •
16 ►
17 ◄
26 →
27 ←
249 ∙
250 ·
254 ■
179 │
221 ▌
222 ▐
219 █
174 «
175 »
240 ≡
also the semi-colon (;) can be used instead of a colon (:). It looks a little weird, but it's a safe alternative anyway.
This is a list of NTFS and Google Drive-friendly ASCII chars that can be used to substitute some of the forbidden ones:
Remember you need to hold down the ALT key on your keyboard while you type the number with the numpad.
Source: https://en.wikipedia.org/wiki/Code_page_437
I will need to check every code on that page to see which ones are safe to use.
If you or somebody knows other codes, please share.