Since streamlining my system the only cables that are not permanently connected to my console are carried in the L1 Compact's cover bag, which is very small. 30 cables is a lot of cables, however, if coiled loosely and independently secured with a Velcro strap, most, small bags should hold them with no problem.
Cheers,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)