Custom folder icon doesn't display for SD card — shows as "generic .png" icon

finder sd-card icon

Solution 1:

I had this problem a while ago, honestly, I've forgotten the exact cause, but I do believe it's related to the icon cache.

Try renaming your drive, or clearing the icon cache.

Related

Prove of the Parseval's theorem for Discrete Fourier Transform (DFT)
Fitting exponential curve to data
Compare Fourier and Laplace transform
Let $N$ be a normal subgroup of index $m$ in $G$. Prove that $a^m \in N$ for all $a \in G$.
"Total" degree of a polynomial?
Exercise 3.15 [Atiyah/Macdonald]
$ \frac{\pi}{4} = \frac{3}{4} \times \frac{5}{4} \times \frac{7}{8} \times \frac{11}{12} \times \cdots$ (just primes in the numerator)
Weakly compact implies bounded in norm [duplicate]
Sigma-algebras on the Natural Numbers
What is meant by canonical?
Polynomial long division: different answers when reordering terms
Closed subspace of $l^\infty$