Main trade-off
Brother ADS-3100
The drive port is on the back. If the installed position makes it impractical to reach, the drive-handoff benefit should not decide the purchase.
Head-to-head
Brother ADS-3100 vs Epson ES-400 II: Brother can file to USB, keep its rear port accessible
The short answer
Choose the Brother ADS-3100 when someone needs to scan to a compatible USB drive at an AC-powered desk, you can reach its rear USB port, and a compatible computer is available when scan options need changing. Its larger feeder also avoids a reload for 51 to 60 supported 80 gsm sheets. Choose the Epson ES-400 II when a compatible computer already handles every scan, the packets fit its paper-specific capacity and its complete price is better. Neither is the answer for direct network scanning.
Before you choose
The reasoning and the trade-offs
Leave the filing for later, but keep access to a setup computer
With Brother, someone can scan onto a drive and leave the filing for later. The port is at the back, so a tight shelf must still let you insert and remove it. Changing scan options uses Remote Setup on a compatible computer. If a computer already receives every file, direct drive saving removes no step from that routine.
What this is based on
Brother distinguishes its rear drive port from its computer connection. Its Scan to USB instructions use Remote Setup when scan options need changing.
Main trade-off
Epson ES-400 II
Its 50-sheet maximum is for 80 gsm paper. The manual reduces that to 43 sheets at 90 gsm.
Brother ADS-3100
- Choose it for
- You want a local USB-drive handoff, with AC power, access to the rear port, a supported drive and a compatible computer available when scan options need changing.
- You repeatedly receive 51 to 60 supported Letter/A4 sheets at 80 gsm, have AC power and a compatible computer or supported USB-drive setup, and want to avoid splitting the packet.
- Main trade-off
- The drive port is on the back. If the installed position makes it impractical to reach, the drive-handoff benefit should not decide the purchase.
Epson ES-400 II
- Choose it for
- Your compatible computer handles every scan, direct drive saving is unnecessary, your paper fits the Epson feeder limit, and its complete price is better.
- Main trade-off
- Its 50-sheet maximum is for 80 gsm paper. The manual reduces that to 43 sheets at 90 gsm.
About this comparison
Compare USB-drive handoffs, computer setup and real feeder limits before choosing the Brother ADS-3100 or Epson ES-400 II.
Imagine the weekly pile of signed forms. If one person scans and another files them later, a drive can be the handoff. If the files need checking, naming and filing on an open laptop immediately, the computer is already part of the job. That difference is more useful here than picking the higher advertised scan rate.
Winner by situation
Start with what you need it to do
Save to a thumb drive at the scanner
Brother supports the drive handoff with AC power, an accessible rear USB port and a supported drive. Changing its scan options uses Remote Setup on a compatible computer. Routine scans use the panel button.
- Brother ADS-3100
- Better fit
- Epson ES-400 II
- Caution
A recurring 55-sheet packet
For supported Letter/A4 sheets at 80 gsm, Brother fits 55 in its 60-sheet feeder. Epson needs the packet split at its 50-sheet limit. This counts loading, not elapsed time.
- Brother ADS-3100
- Better fit
- Epson ES-400 II
- Caution
A 45-sheet job controlled from a computer
Both fit 45 supported 80 gsm sheets. At 90 gsm, Epson lists 43 sheets, so even this shorter packet needs splitting. Use the limit for the actual paper.
- Brother ADS-3100
- Good
- Epson ES-400 II
- Good
Scan wirelessly from a computer across the room
Both exact models document USB computer connections, so software cloud destinations do not remove the cable. Epson's shared manual reserves wireless connectivity for ES-500W II.
- Brother ADS-3100
- Not suitable
- Epson ES-400 II
- Not suitable
What matters in practice
The differences that matter
Leave the filing for later, but keep access to a setup computer
With Brother, someone can scan onto a drive and leave the filing for later. The port is at the back, so a tight shelf must still let you insert and remove it. Changing scan options uses Remote Setup on a compatible computer. If a computer already receives every file, direct drive saving removes no step from that routine.
How we reached this conclusion
Brother distinguishes its rear drive port from its computer connection. Its Scan to USB instructions use Remote Setup when scan options need changing.
The extra feeder space helps only the packets you actually receive
A recurring 55-sheet packet of supported 80 gsm Letter/A4 paper fits Brother in one load and needs two on Epson. At 45 sheets, both fit one load at that weight. But Epson allows only 43 sheets at 90 gsm. Count the originals and check their stock before treating either headline capacity as your everyday capacity.
How we reached this conclusion
Both maximum feeder counts use supported A4 or Letter paper at 80 gsm. Epson publishes a lower capacity for heavier paper.
Cloud filing still needs the computer and its connection
These exact scanners connect to a computer by USB. Cloud destinations in their software do not let you put either scanner across the room and send a job over Wi-Fi. If the scanner must be shared directly over the network, choose a verified network model instead. The wireless ES-500W II and ADS-3300W are different products.
How we reached this conclusion
The exact-model interface tables list computer USB. Network features in the shared manuals belong to other models.
Choice A
Brother, ADS-3100
ADS-3100
A 60-sheet drive-handoff scanner for an AC-powered desk with rear-port access. Changing scan options uses a compatible computer.
- Best matched use
- You want a local USB-drive handoff, with AC power, access to the rear port, a supported drive and a compatible computer available when scan options need changing.
Checked facts
- Document feeder: 60 sheets at stated 20 lb basis
- USB destination: Computer USB plus separate USB memory-stick host
- Rated duplex scan rate: Up to 80 images per minute
- Wireless hardware: USB standard interface
Choice B
Epson, ES-400 II
ES-400 II
A USB computer scanner with room for 50 supported 80 gsm sheets, or 43 at 90 gsm. Direct drive saving is not established.
- Best matched use
- Your compatible computer handles every scan, direct drive saving is unnecessary, your paper fits the Epson feeder limit, and its complete price is better.
Checked facts
- Document feeder: 50 sheets at stated 80 gsm basis
- USB destination: Computer USB interface
- Rated duplex scan rate: Up to 70 images per minute
- Wireless hardware: USB standard interface
Meaningful differences
What changes the fit
| What changes | Brother ADS-3100 | Epson ES-400 II | Why it matters |
|---|---|---|---|
| Document feeder | 60 sheets at stated 20 lb basis | 50 sheets at stated 80 gsm basis | The capacities align at 80 gsm. Thicker paper changes the limit. The 55-sheet example does not apply unchanged to mixed or delicate originals. |
| USB destination | Computer USB plus separate USB memory-stick host | Computer USB interface | Brother saves to a supported drive after computer-based configuration, with rear-port access and AC power. Epson documents a computer USB interface. |
| Rated duplex scan rate | Up to 80 images per minute | Up to 70 images per minute | An image is one side. These ratings do not prove OCR, naming or upload finishes at that rate. |
| Wireless hardware | USB standard interface | USB standard interface | A shared-manual Wi-Fi row for ES-500W II does not add Wi-Fi to ES-400 II. |
What you give up
Every choice has a cost
If you choose Brother ADS-3100
- Scan to USB settings use computer-based Remote Setup. A supported drive and AC power are still required for routine scans.
If you choose Epson ES-400 II
- The documented USB connection is to a computer. A direct USB-drive saving destination is not established for this exact model.
Recommendation switch
The decision flips if...
The computer handles every file, packets fit the paper-specific Epson limit, direct drive saving is unused and Epson has the better complete price
Choose Epson ES-400 II. Then the Brother drive destination and spare feeder space do not remove work from your routine. Compare the exact complete packages. No current price advantage is asserted here.
A USB-drive handoff matters, rear-port access and AC power are available, and a compatible computer is available for scan-option changes
Choose Brother ADS-3100. Choose Brother with a supported USB Mass Storage drive up to 128 GB in a listed format. Its panel button handles routine saves. Changing scan options uses computer-based Remote Setup.
Users need direct Wi-Fi or Ethernet scanner access
Choose neither. Move to an exact network-enabled model.
What matters in practice
Before you choose
What this comparison cannot tell you
- No hands-on testing or current-price comparison is claimed. Published speeds are manufacturer ratings under their stated conditions.
What the facts say
What the comparison shows
Useful conclusions from the current document scanners comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Brother ADS-3100 |
|
| |
| Epson ES-400 II |
|
|
Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Brother ADS-3100
You want a local USB-drive handoff, with AC power, access to the rear port, a supported drive and a compatible computer available when scan options need changing.
You repeatedly receive 51 to 60 supported Letter/A4 sheets at 80 gsm, have AC power and a compatible computer or supported USB-drive setup, and want to avoid splitting the packet.
See price & reviews on AmazonEpson ES-400 II
Your compatible computer handles every scan, direct drive saving is unnecessary, your paper fits the Epson feeder limit, and its complete price is better.
See price & reviews on AmazonLinks open in a new tab.