Replacement for ST3320820ACE: Drop-In Alternatives We Stock
Looking for a replacement for the ST3320820ACE (ST3320820ACE - Seagate DB35 Series 320GB 7200RPM ATA-100 8MB Cache 3.5-inch Hard Drive)? Pro Disk Network ships Seagate drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the ST3320820ACE
| SKU | ST3320820ACE |
|---|---|
| Product | ST3320820ACE - Seagate DB35 Series 320GB 7200RPM ATA-100 8MB Cache 3.5-inch Hard Drive |
| Current price | $134.13 |
| Stock status | In Stock |
| Detail page | View ST3320820ACE › |
Drop-in replacements for ST3320820ACE
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
ST3320820NA - Seagate BarraCuda ES 320GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 3.5-inch Hard Drive
SKU: ST3320820NA
Price: $328.92
9AG283-260 - Seagate DB 35.1 Series 250GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache (CE) 3.5-inch Hard Drive
SKU: 9AG283-260
Price: $204.36
9AG283-645 - Seagate DB 35.1 Series 250GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache (CE) 3.5-inch Hard Drive
SKU: 9AG283-645
Price: $204.36
9AG283-625 - Seagate DB 35.1 Series 250GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache (CE) 3.5-inch Hard Drive
SKU: 9AG283-625
Price: $204.36
9AG283-262 - Seagate DB 35.1 Series 250GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache (CE) 3.5-inch Hard Drive
SKU: 9AG283-262
Price: $204.36
9AG283-500 - Seagate DB 35.1 Series 250GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache (CE) 3.5-inch Hard Drive
SKU: 9AG283-500
Price: $204.36
9AG485-505 - Seagate DB35.1 Series 400GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 3.5-inch Hard Drive
SKU: 9AG485-505
Price: $385.47
9AG485-615 - Seagate DB35.1 Series 400GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 3.5-inch Hard Drive
SKU: 9AG485-615
Price: $385.47
9AG485-621 - Seagate DB35.1 Series 400GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 3.5-inch Hard Drive
SKU: 9AG485-621
Price: $385.47
9AG485-624 - Seagate DB35.1 Series 400GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 3.5-inch Hard Drive
SKU: 9AG485-624
Price: $385.47
9AG485-125 - Seagate DB35.1 Series 400GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 3.5-inch Hard Drive
SKU: 9AG485-125
Price: $385.47
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.