The wide ones that fit under a window or next to a desk. Lateral files hold more per drawer than vertical cabinets and keep everything within arm's reach. Liquidation-sourced, so you can buy a few.

Cabinets for the stuff that doesn't fit in a file drawer. Supplies, personal items, the overflow. Locking options if you need them, various finishes. Liquidation-sourced, so you can actually afford to get organized.

Storage that goes up instead of out. Hutches sit on credenzas or mount to walls, keeping supplies and files within reach without eating desk space. Various finishes from corporate liquidations.

For the stuff that absolutely cannot burn. Fireproof storage rated for extreme temperatures—various sizes from corporate liquidations. The peace of mind is real; the price is better than you'd expect.